fastest-threading reel
ever developed . . .
the audiotape C-Slot Reel ,
BETTER THAN EVER!
The popular C-Slot reel — the fastest, easiest-threading reel ever developed — has
been structurally redesigned. It's now stronger than ever and even more con-
venient than before.
Since the revolutionary reel design was introduced about a year ago, engineers
have carefully checked service experience on all types of machines under all
operating conditions. This study pointed the way to still further improvements.
Now, a slimmer, smoother tape slot gives a virtually unbroken hub surface for
smoother winding under even the highest tape tension. A reinforced beveled edge
guides the tape more easily into the C-slot. Inside the hub, extra "ribs" have been
added and the bonding area has been increased by 50%, making the entire struc-
ture practically indestructible.
No other reel can approach the C-slot for fast, easy threading. And the new, im-
proved design is now standard for all 5" and 7" reels of Audiotape— an extra-value
feature at no extra cost! Another important reason why it pays to specify Audio-
tape for every recording need.
AUDIO DEVICES, INC.
444 Madison Ave., N. Y. 22, N. V.
In Hollywood: 840 N. Fairfax Ave.
In Chicago: S428 Milwaukee Ave.
Export Dept: 13 East 40th St., N.Y. 16, N.Y.
Cables "ARLAB"
Hi*
cmdxo
record
Published by
AUDIO DEVICES, INC.
444 Madison Avenue,
New York 22. N.Y.
cuuliocitxcs
trnfl ioto py
audiofilm
aiuliopmnts
1958-1959
AUDIO tt£COKl>
October, 1958
23
QUICK FACTS ON MAGNETIC TAPE RECORDERS
(Additional information can be obtained by writing to the manufacturer)
Manufacturer
ALTO
FONIC
MUSIC
SYSTEMS,
INC.
935 Commercial
Street,
Palo Alto, Calif.
Model and Price
Continuous automatic tape reproducers
for rack mounting
Model 450D
with pre-amp
$855.00
Model 450DA
with
combination
pre-amp power
amplifier and
mixer
$972.00
Add $30.00 for 7 '/, ips
Model 465
Deluxe Console
$1191.00
Model 466
$1140.00
Frequency
Response
50-10,000
cycles ( =2 db)
at 7'/ 2 ", sec.
50-15,000
cycles (=4 db)
at 71/2"; sec.
50-7500 cycles
(±2db)
at 3V4" sec.
as above
AMERICAN
CONCERTONE
Division of
American
Electronics, Inc.
9449 West
Jefferson Blvd.
Culver City, Calif.
RACK SERIES
Model 455-50WR
$1397.00
Model 458
Dual Unit — Automatic
intermix programming
system $2275.00
Model 480
Ad Merchandiser
$345.00
Model 482
(Price on
request)
Model 483
(Price on
request)
SERIES 30
Model 31, full track recorder $695.00
Model 32, half track recorder $695.00
Model 33, stereo recorder $995.00
Modification ST, to full track, half
track and two channel stereo $204.00
as above
Data
Ampex-designed, proved, licensed. Plays dual track, pre-
recorded, 8-hour tapes continuously. Plays 4 hours on
one track, reverses automatically and plays 4 hours on
the opposite track, reversing and repeating indefinitely.
Signal-to-noise ratio — 50 db. Simplest mechanism
driven by one hysteresis synchronous motor and unique
Ampex reel take-up system. Includes plug-in electronic
section with positive metallic tape impulse automatic re-
versing. Exclusive reel change switch. Operates with
variety of accessories including Ad Merchandiser.
Model 450DA, same as above except has combination
pre-amp and 12-watt high fidelity power amplifier with
4, 8, 16 ohm and 70-volt output. Individual volume con-
trols for music, microphone, chimetone pager, Ad
Merchandiser: master gain control, and tone control.
Receptacle for timers, microphones, low impedance
transformer, and Ad Merchandiser.
Model 465 contains Ampex-designed Model 450DA.
Completely automatic. Space for Ad Merchandiser unit
in top control section exposed by lifting hinged lid.
Master volume control and monitor volume control. Ex-
tended range monitor speaker in a separate enclosure
within console. 37" high, 34" wide, 18" deep. Shipping
weight, 161 lbs.
Model 466. The same basic unit as 465, in cabinet of
Zolotone (no front panel). Master and monitor volume
controls and automatic timer control. (TlO). (Without
T-10 Timer, $1095.00) Monitor speaker included.
A typical rack installation including rack, 450D, moni-
tor panel, T-10 Timer panel, 50WR 50-watt high fidelity
amplifier and blank panel. Other combinations are pos-
sible with the ad merchandisers, various power ampli-
fiers, timers, chimetone, and voice paging.
50-7500
cycles (=2 db)
at 3 % "/sec.
50-15,000
cycles ( =2 db)
at 15" /sec.
50-12,000
cycles ( =2 db)
at 7'/j"/sec.
50-6,500
cycles (±2 db)
at 3 3/4 " sec.
An automatic programming system for FM radio sta-
tions, wired music, community television networks, closed
circuit systems, etc. Timers and silent sensing provides
switching between any desired number of selections from
each 450D. Ad Merchandiser also can be used to insert
announcements automatically.
Provides for automatic insertion of a series of announce-
ments one at a time, between musical selections, with
built-in silent sensing. Playback only. Selector switch
permits selection of 1 to 10 musical selections between
ads. Switch provides for monitoring cartridge without
affecting background music. Easy to change snap-in
Cousino cartridge 1 to 28 minutes. Larger cartridge pro-
vides up to one hour. Mounts in top panel of Alto
Fonic consoles, or in drawer of rack systems. Meets all
specifications of 450 unit. Plugs into 450DA.
Model 482 is same as Model 480 but self-contained and
automatic. Play back only. Heavy duty. Cousino car-
tridge for any length announcements totaling 2 to 60
minutes. Self contained 3-watt amplifier and speaker.
High impedance output available for other amplifiers.
External switch will trigger start or built-in timer may be
set for time intervals from 5 minutes to 1 hour.
Model 483 is same as 482 with playback /record combina-
tion including microphone and level indicator. Grip to
talk switch controls recording.
All Series 30 models have following features: Two-speed
direct drive hysteresis synchronous motor and two torque
motors; 3 heads with provision for 2 more; 4Yz" VU-
type meter; 2-channel input mixer; A-B test fader for
cueing/editing switch. Instant speed selection of 15"/
sec. and 7y 2 " /sec or 3J4"/sec and 7!/ 2 "/sec. Signal-to-
noise, 55 db by proposed NAB Standard (full track).
Total harmonic distortion, 2% at zero VU. Total flutter
and wow, less than 0.1% rms at 15"/sec, 0.2% at IVi I
sec. Fast forward and rewind, less than 60 sec. for 2500
ft. High impedance microphone input and unbalanced
bridging input. Output impedance, cathode follower,
600 ohms with plug-in transformer.
— The World's Finest Magnetic Recording Tape
Description
SUPER-lHIN'-udi-op.
SUPER-THIN AUDIOTAPE
on 1/2 -mil "Mylar"
(in the Yellow Box)
Twice as much recording time per reel as stand-
ard plastic-base tape. Suitable for extended-
play applications where tape tension is not ex-
cessive. Series 31.
SSrO-lH qiicliotnpp
o.. TEMPERED 'Mylar
SUPER-THIN AUDIOTAPE
on "Tempered" "Mylar"
(in the Yellow-and-Red Box)
Twice as much recording time per reel as
standard plastic-base tape, and is twice as
strong as other double-length tapes. Will not
stretch or break on any tape recorder — will
not dry out or embrittle with age. Series 31T.
MASTER LOW PRINT-THROUGH
AUDIOTAPE
on Plastic Base
The finest, professional-quality recording tape.
Base material, 1%-mil acetate. Maximum fidel-
ity, uniformity, frequency response and freedom
from noise and distortion. . . . Plus low print-
through. Series 51M.
MASTER LOW PRINT-THROUGH
AUDIOTAPE
on l'/ 2 -mil "Mylar"
Super-durable tape that meets highest stand-
ards of performance. Withstands extreme tem-
peratures and is virtually immune to humidity.
Gives maximum tape life under any conditions.
. . . Plus low print-through. Series 71M.
Type No.*
1231
2431
1231T
2431 T
4831T-R
±4831T-FS
651-M
1251-M
2551 H-M
2551R-M
±2551 FS-M
5051 H-M
5051R-M
671-M
1271-M
2571 H-M
2571 R-M
±2571 FS-M
Length
1 200 ft.
2400 ft.
1 200 ft.
2400 ff.
4800 ft.
4800 ft.
600 ft.
1200 ft.
2500 ft.
2500 ft.
2500 ft.
5000 ft.
5000 ft.
600 ft.
1 200 ft.
2500 ft.
2500 ft.
2500 ft.
Reel-
5 Plastic
7" Plastic
5" Plastic
7" Plastic
IOV2" Aluminum Reel
10'/ 2 " Fiberglass (RETMA)
5 Plastic
7" Plastic
NARTB Hub
lO'yV Aluminum Reel
10% " Fiberglass (RETMA)
NARTB Hub
14" Aluminum Reel
5 Plastic
7" Plastic
NARTB Hub
10V2" Aluminum Reel
lOVb" Fiberglass (RETMA)
List Price
S 5.00
9.25
6.50
11.95
26.90
26.90
2.75
4.30
9.80
12.50
12.50
19.55
26.00
4.85
8.05
14.65
17.40
17.40
* Type Numbers listed cover red oxide wound on reel with OXIDE IN. For tape wound
with Oxide Out, change last digit of Type No. from "I" to "0." E.g. Audiotape
t250 covers 1200 ft. reel of plastic base tape wound with Oxide Out.
t COLORED PLASTIC REELS. Audiotape on 5" and 7" plastic reels can be supplied on
colored reels ot no increase in price when ordered in lots of 30 reels or more of any
one color. To designate color of reel (Red, Yellow, Green or Blue) odd letters "RR"
ond "YR," "GR" or "BR" to Type No. listed. E.g. — Type t251YR covers 1200 feet
of standard plastic-base tope on Yellow Reel. Type 1251 GBR covers 1200 feet of Green
plastic-base tape on Blue Reel.
(: "FS" in Type No. indicates Fiberglass reel with solid hub and 5/16" center hole.
Audio Accessories
Item
CORRUGATED MAILING BOXES
Strong, re-usable containers for 5",
10%" reels.
7" and
RECORDING HEAD CLEANER
Especially formulated for use on re-
cording heads. Contains silicone sol-
vent. Superior to carbon tetrachloride.
One-ounce bottle with brush.
AUDIO SELF-TIMING LEADER TAPE
A strong, durable leader
tape of white "Mylar" ma-
terial with spaced markings
to permit accurate rate
time of leader intervals.
Each box contains 100 feet,
V4" wide.
ADHESIVE REEL LABELS
Provide positive identi-
fication of your tapes,
right on the reel. Sim-
ply press to apply, pull
off to remove. Envelope
of 30, 2" x W labels.
Type
No.
5M
7M
10M
1HC
31
30 A L
List
Price
$.15
.20
.30
65
55
.20
Item
AUDIO HEAD DEMAGNETIZER
'
Removes all permanent magnetism
from recording and reproducing
heads in a matter of seconds. Includes
7-foot cord and is individually boxed.
•*W«~<» J AUDIO HEAD ALIGNMENT TAPE
=t V Pre-recorded at 2,000, 10.000 and 15,-
^n 000 cps (15"/sec.) with precisely cor-
/ rt-ct head alignment. Each box contains
^^^3 Hf 300 ft. on a 4" reel and instructions.
how to make
GOOD TAPE RECORDINGS
This handbook of tape recording con-
tains up-to-the-minute information of in-
terest and practical value to every tape re-
cordist. Profusely illustrated with photo-
graphs, charts and diagrams prepared
especially for this book, it contains 150
pages of valuable information on all
phases of modern tape recording.
Type
No.
400
200
List
Price
10.00
10.00
Clothbound
25C
2.50
Paperbound
15P
22
41 OIO RECORD
October, 1958
The COMPLETE LINE of professional quality AUDIOTAPE
Manufacturer
Description
PLASTIC-BASE AUDIOTAPE
on l'/j-mil cellulose acetate
(in the Red Box)
Meets the most exacting requirements of the
professional, educational and home recordist at
minimum cost. Known the world over for its
matchless performance and consistent uniform
quality. Series 51.
AUDIOTAPE ON I'/j-MIl MYLAR*
(in the Green Box)
A premium-quality professional tape that pro-
vides the utmost in mechanical strength and
immunity to temperature and humidity. Will
not dry out or embrittle with age. Series 71.
"DuPont Trade Mark
"LR" LONGER-RECORDING AUDIOTAPE
on 1-mil "Mylar"
(in the Black -and-Red Box)
50 ( c more recording time per reel. The strong,
super-durable polyester film base assures
trouble-free operation even under severe con-
ditions of heat and humidity. Series 61.
PLASTIC-BASE "LR" AUDIOTAPE
on 1-mil cellulose acetate
(in the Blue Box)
50' ( more recording and playback time on low-
cost 1-mil cellulose acetate base, affording maxi-
mum economy for applications where high
strength is not required. Series 41.
Type No.*
151
351
651
1251
255 1H
255 1R
±2551FS
5051 H
505 1R
671
1271
2571 H
2571 R
±2571 FS
5071 H
5071 R
261
'61
1861
366 1H
3661 R
±3661 FS
7261 H
726 1R
941
1841
364 1H
3641 R
±364 1FS
7241 H
7241 R
Length
150 ft.
300 ft.
600 ft.
1 200 ft.
2500 ft.
2500 ft.
2500 ft.
5000 ft.
5000 ft.
600 ft.
1200 ft.
2500 ft.
2500 ft.
2500 ft.
5000 ft.
5000 ft.
225 ft.
900 ft.
1800 ft.
3600 ft.
3600 ft.
3600 ft.
7200 ft.
7200 ft.
900 ft.
1800 ft.
3600 ft.
3600 ft.
3600 ft.
7200 ft.
7200 ft.
Reel-
3 Plastic
4" Plastic
5" Plastic
7" Plastic
NARTB Hub
IOV2" Aluminum Reel
10'/ 2 " Fiberglass (RETMA)
NARTB Hub
14 Aluminum Reel
5 Plastic
7" Plastic
NARTB Hub
IOV2 Aluminum Reel
lO'/j" Fiberglass (RETMA)
NARTB Hub
14 Aluminum Reel
3 Plastic in Self-Mailer
Pkg.
5" Plastic
7" Plastic
NARTB Hub
10 1 / 2 " Aluminum Reel
lO'/j" Fiberglass (RETMA)
NARTB Hub
14 Aluminum Reel
5 Plastic
7" Plastic
NARTB Hub
10y 2 Aluminum Reel
10'/ 2 " Fiberglass (RETMA)
NARTB Hub
14 Aluminum Reel
Miscellaneous AUDIOTAPE Items
List Price
S 0.70
1.35
2.25
3.50
8.50
10.90
10.90
17.00
22.10
4.25
7.00
12.75
15.15
15.15
30.30
36.30
1.00
3.75
6.50
12.50
15.00
15.00
26.00
32.00
3.50
5.50
10.00
12.85
12.85
20.00
26.00
Item
Type No.
Description
List Price
^_ ^ COLORED PLASTIC-BASE AUDIOTAPE
/^^^■^*V on iy 2 -mil cellulose acetate
l^gJ^^^U^ ( ' n same box as above
^1 with label for color)
\l^"t AMji Green and blue colored Audiotape, in conjunc-
^AC^**V|£^i tion with the standard red-brown tape, provide
nSSE it^M instant visual identification of recorded selec-
jf tions spliced into a single reel (as shown) —
permit fast and easy color cueing and color
coding. Eliminate need for identifying leaders
between selections.
GREEN BLUE
LENGTH
REEL
151G
351G
651G
1251G
2551 HG
255 IRG
±2551 FSG
5051 HG
505 IRG
151B
351B
651B
1251B
2551 HB
255 IRB
±2551 FSB
5051 HB
505 IRB
150 ft. 3" Plastic
300 ft. 4" Plastic
600 ft. 5" Plastic
1200 ft. j 7" Plastic
2500 ft. NARTB Hub
2500 ft. lO'/j "Aluminum Reel
2500 ft. ! 10'/ 2 " Fiberglass (RETMA)
5000 ft. NARTB Hub
5000 ft. 14" Aluminum Reel
S .70
1.35
2.25
3.50
8.50
10.90
10.90
17.00
22.10
EMPTY AUDIOTAPE REELS
IN INDIVIDUAL BOXES
^^^ Standard
i^^5*^!*liBW Reels
3PB
4PB
5PB
7PB
10RB
10FS
14RB
10H
3" Plastic in Box
4" Plastic Reel in Box
5" Plastic Reel in Box
7" Plastic Reel in Box
I0y 2 " Aluminum Reel in Box
10'/ 2 " Fiberglass (RETMA) in Box
14 Aluminum Reel in Box
NARTB Metal Hub
.25
.45
.60
.75
4.00
4.00
7.40
.70
Plastic
~~ Reels
5PBR
5PBY
5PBG
5PBB
Red \
Yellow 5 „ p|asf . c Ree| jn B<jx
Blue I
Green /
.60
7PBR
7PBY
7PBG
7PBB
Red j
Yellow (-,»,.. .. - . . „
„, / 7 Plastic Reel in Box
Blue 1
Green /
.75
AMERICAN
CONCERTONE
Division of
American
Electronics, Inc.
9449 West
Jefferson Blvd.
Culver City, Calif.
AMERICAN
GELOSO
ELECTRONICS,
INC.
312 Seventh Ave.
New York 1, N. Y.
AMPEX
CORPORATION
934 Charter St.
Redwood City
California
AMPEX
AUDIO, INC.
a subsidiary of
Ampex Corporation
1020 Kifer Road
Sunnyvale, Calif.
Model and Price
SERIES 60
Model 61
$495.00
Model 62
$595.00
Model 63
$695.00
(Cases for above
$60.00 extra)
-i-i.
Model G2S5 SP
Geloso
"StenOtape"
Portable
Recorder
$179.95
— lS
Model 300-C
Console
Tape Recorder
$2250.00
Model 351
Console
Tape Recorder
$1475.00
Other Equipment:
"Caprice" Uncased
Model 902 Model 952
$449.50 $595.00
"Caprice" Portable
Model 960
$650.00
Model 910
$495.00
Model 2510
Stereo system
$849.50
Model 2560
Stereo system
$995.00
Model 2010 Amplifier-Speaker $199.50
Model 601
Portable
Tape Recorder
$595.00
Model 620 Model 601-2
Amplifier-Speaker 2-Track Stereophonic
$189.50
Portable $995.00
Frequency
Response
30-15,000
cycles |i2 db)
at 15" sec.
40-12,000
cycles (±2 db)
at 7Vi"/sec.
60-10,000 cycles
at 3 3 / 4 "/sec.
80-8,000 cycles
at 1 V 8 " ,' sec.
30- 1 5,000
cycles ( 2 db)
at 15" sec.
40-15,000
cycles ( ±4 db)
at 71/2" I set.
1 2 db 40 to
10,000 cycles)
30- 1 5,000
cycles ( 2 db)
at IS" /sec.
30-15,000
cycles (±4db)
at 7'/ 2 ".'sec.
50-7,500
cycles ( 2 db)
at 3 % "/see.
At 7'/j sec.
30-20,000 cycles
(±2db)
50-15,000 cycles
At 3% "sec.
30-15,000 cycles
(±2db)
50-10,000 cycles
30- 1 5,000
cycles ( —4 db)
at 7y 2 "/sec.
( 2 db 40 to
10,000 cycles)
Data
All Series 60 models have the following features: two
high-speed torque motors with positive self compensat-
ing braking system. Direct hysteresis synchronous tape
drive for 99.8% accuracy. Torque control switch and
concentric playback level control. Five-pushbutton con-
trol. VU type meter. Tape speeds are 15 and 7 J/2 or 7I/2
and 3J^ ips. Signal-to-noise ratio is 45 db at 71/2 ips
single track, 50 db at 15 ips single track. Wow and
flutter is 0.15% rms at 15 ips, 0.25% rms at 7J/2 ips.
Bias frequency is 100 kc.
Model 61 is half track record/playback. Model 62 is half
track record, with half track, full track and stereo play-
back. Model 63 is full stereo record /playback.
Imported dual track recorder and dictating/transcriber.
Speeds: V/%" and 3^4 - 7sec. Four push-button controls
for record, fast rewind, playback and stop. Uses foot
pedal and finger-tip "remote" controls ($19.95 each) for
instantaneous start, stop and back space. Automatic erase
and correction. Operates in boat or auto with Inverter,
'"do-light" recording level indicator. Special adjustment
for line voltages between 110 and 240 AC. Can play up
to 128 minutes. Transparent lucite cover for dust pro-
tection. Preamp output for hi-fi system. Extension speaker
jack. Many accessories available. Dimensions: 5I/2" x
9%" x V/ B ". Weight: 7'/ 2 lbs.
Professional-type, single-track, dual-speed recorder oper-
ating at 15" and IV2" P er second. Signal-to-noise, over 60
db by NAB standards. Instant start and stop. Flutter and
wow, less than 0.1% at 15"/sec. Rewind time, 1 min.
for 2400-ft. reel. Timing accuracy, ± 0.2%. Push button
controls for start, stop and record — may be remotely
operated. Separate long-life, plug-in heads for erase,
record and playback. Other features as on Model 351
below. Also available for portable or rack mounting.
Available only on a factory-direct basis.
Professional-type single or dual-track recorder with tape
speeds of 7I/2" and 15" or 3J4" and 7Vl ■ Signal-to-
noise, 60 db (single track) or 55 db (dual track). Flutter
and wow, less than 0.2% at 15"/sec. Instantaneous start-
ing. Rewind time, 1 min. for 2400 ft. reel. Timing accu-
racy, ± 0.2%. Features new "plug-in" printed circuits,
new low-noise input stage, new plus 8 output, new in-
terna! power supply, and "de-popped" recording con-
trols. Push-button controls for start, stop, fast forward
and rewind. Independent record and playback systems
permit monitoring input or tape during recording or
playback. Also available for portable or rack mounting.
Two and three channel recorders for stereophonic or
binaural sound recording and parallel recording. Portable
or rack mounting. Information on request.
Model 960 is a two-speed, stereo recorder that includes
an exclusive combination half-track and full-track erase
head to permit either stereo recording or halftrack
recording. Plays back half-track, full track, 2-track stereo
and 4-track stereo tapes, and has an automatic stop
mechanism. Signal-to-noise, better than 55 db below peak
record level at TYz"/ sec - and 50 db at 3^4'Vsec. Flutter
and wow, under 0.2% at 71/2"/sec., 0.25% at 3%"/sec.
Rewind time, less than 90 sec. for 1200 ft. Inputs: high
impedance line 0.4v rms for program level: high imped-
ance microphone. Playback output greater than 0.75 rms
into high impedance load. Weight: 38 lbs.
Model 910 is same as above except for two-speed, half-
track monaural record. Plays back 2-track stereo, 4-
track stereo, half track and full track. Model 2510 stereo
system includes Model 910 and two speaker-amplifiers
(2010). Model 2560 stereo system includes Model 960
and two speaker-amplifiers (2010).
Portable, professional-type single-track or dual-track
recorder with 7'/2" tape speed. Takes up to 7" reels.
Signal-to-noise, over 55 db. Flutter and wow, below
0.17%. Starting and stopping time, less than 1/5 second.
Fast forward and rewind, 90 seconds for 1200 ft. Timing
accuracy ± 0.2% for 30 minute recording. Separate
record and playback amplifiers. Separate erase, record
and playback heads. VU meter, independent level con-
trols for microphone and line. Weight, 28 lb.
Model 601 tape transport with two modified 601 elec-
tronic chassis. Full-track erase, two-track record and
two-track playback. Signal-to-noise, over 50 db either
channel. Inter-track crosstalk rejection, over 50 db.
AUDIO RECORD
October, 1958
21
Monufocturer
AMPEX
AUDIO, INC.
a subsidiary of
Ampex Corporation
1020 Kifer Road
Sunnyvale, Calif.
Model and Price
"Crescendo" Console Music Systems
6500 Series
$1895.00
Other Consoles:
4000 Series
from $549.50
8000 Series
$2650.00
AMPLIFIER
CORPORATION
OF AMERICA
398 Broadway
New York 13,
N. Y.
(other models
available)
Model
610-A
610-B
610-C
610-TD
610-SD
610-E
610-DM
'Magnemite" Portables 610-EM
Speed
in /sec.
l5 /l4
l 7 /s
3%
7%
7'/j
15
5 /l4-7'/ 2
l 7 /,-15
Price
$275
225
255
275
295
335
355
395
Frequency
Response
At 7 >/, sec.
30-20,000
cycles (=2 db)
50-15,000
cycles
At 33/, sec.
30-15,000
cycles (=2 db)
50-10,000
cycles
300- 2,500 cps
100- 3,000 cps
50- 5,000 cps
50- 7,500 cps
50- 7,500 cps
50-15,000 cps
J
as above
Weathertite
"Magnemites"
(Add $30 to price
of Std. Units)
VU "Magnemite'
-CI
Model
610-AV
610-BV
610-CV
610-TV
610-DV
610-EV
"Flyweight Magnemite'
310-A
"Secret
Recorder"
210-B
210-BC
Speed
in sec.
1 7 /e
33/ 4
7 '/,
15
'714
1%
3%
7'/i
7'h
15
1%
l 7 / 8
3%
Price
$365
315
345
365
385
425
$340
290
320
340
360
400
$349
as above
Dato
Each Crescendo console includes a Model 960 stereo-
phonic tape recorder-reproducer, described on page 3,
plus: a Garrard 4-speed record changer with stereo/
monaural diamond stylus pick-up, push-button Audio
Control Center, Ampex 2-channel AM and FM stereo-
phonic tuner, two matched Ampex amplifier speaker
units consisting of twin 15 -watt amplifiers and six
speakers — a 12" bass, 8" mid-range and one omni-
directional high-frequency projector for each channel.
Available in Contemporary Walnut, Traditional Ma-
hogany, Contemporary Teak, French Provincial.
Completely self-contained, battery-operated portable-
with spring motor drive. Models 610-SD and -E, one
track. Four speed models 610-DM and -EM, one or
two track. All others dual track. Winding interval,
3 to 15 min. Motor can be rewound while operating.
Indicator signals 30 sec. before motor rewind. Play-
back through headphones or external amplifier. Optional
erase. Dimensions, 11" x 8" x 5" for 610-A and B; 11"
x 10" x 7" for all others. Weight, 12 to 17 lb.
300- 2,500 cps
100- 3,000 cps
50- 5,000 cps
50- 7,500 cps
50- 7,500 cps
50-15,000 cps
300- 2,500 cps
100- 3,000 cps
50- 5,000 cps
50- 7,500 cps
50- 7,500 cps
50-15,000 cps
100- 3,000 cps
$369
SINGLE CHANNEL
1 7 /e
3%
7'/i
15
$345
365
385
405
DUAL CHANNEL
'Magneloop"
Continuous Loop
Tape Recorder
l 7 /s
$495
33/ 4
515
7 V?
535
15
555
'Stereo-Magnemite"
*E=
_^
T \ ^
i
.**
h
611-C
61 1-D
611-E
-..*■
3%
7Vl
15
$355
395
435
100- 3,000 cps
50- 5,000 cps
All standard "Magnemites"' available in weather-tight
sealed aluminum cases with tongue and grooved edges
and built-in neoprene gasket seals. Will successfully
withstand severe environmental conditions. Satin fin-
ished case anodized to resist corosion.
Completely self-contained battery-operated portables with
spring motor drive. 610-DV and EV are single track —
others, dual track. Winding interval 3 to 30 min., de-
pending on tape speed. Motor can be rewound while
operating. VU meter for measuring record level, output
level, "A" battery and "B" battery. Playback through
earphones or external amplifier. PM erase optional at
extra cost. High and low level inputs. Output imped-
ance, 50,000 ohms. Incoming signal can be monitored
by VU meter or earphones. Dimensions, 6]/ 2 " x 9'/ 2 "
x 14". Weight, approx. 19 lb.
Portable, battery-operated electric motor driven record-
ers with single tape speed. Models 310-SD and 310E
are single track, others dual track. Max. reel size, 5".
Rewind time, 2 min. Earphone monitor and playback.
No erase. PM erase available as optional feature. Pow-
ered by 5 replaceable mercury batteries. Dimension*
5l/ 2 " x 9" x 12". Net weight: 8 lb.
50- 2,500 cps
50- 7,500 cps
50-10,000 cps
50-15,000 cps
50- 2,500 cps
50- 7,500 cps
50-10,000 cps
50- 1 5,000 cps
10O- 3,000 cps
50- 7,500 cps
50- 1 5,000 cps
Hidden in zipper compartment of briefcase, operates
anywhere on dry cell batteries. Hidden microphone and
concealed start-stop clasp switch. Dual track, single
or 2-speed recorder operates on replaceable batteries.
Maximum reel size 5". Rewind time, 2 min. Earphone
playback. No erase. PM erase available as optional fea-
ture. Weight complete, including briefcase, 11^ lb.
Designed to record and play back any messages, musi-
cal programs or sound effects up to 60 min. in length
on cartridge-loaded endless loop of std. 14" tape. Auto-
matic erase. Push-button start and stop, switch or relay
remote control. Electronic-eye recording level indicator.
Microphone and bridging inputs. Output impedance,
600 ohms. Output level, +6VU. Headphone monitor-
ing. Standard rack panel mounting or custom rack
cabinet. Size, 19" x &y 4 " x 9l/ 2 ". Weight, 24 lb.
Portable, stereophonic battery-operated spring-motor
recorder. Mechanically similar to 610 series. Two sep-
arate channels for stereophonic recording. Independent
gain for each channel. Can be monitored with binaural
headphones while recording. Optional P.M. erase. In-
put impedance, 1 Megohm. Output impedance, 50,000
ohms. Size, 8l/ 2 " x 11" x 10". Weight 17 lb.
Monufocturer
WEBSTER
ELECTRIC —
ELECTRONICS
DIVISION
Racine,
Wisconsin
Model and Price
"Ekotape"
Model
320
$279.50
"Ekotape"
Stereophonic
Model
330
$439.50
WILCOX-GAY
CORPORATION
Charlotte,
Michigan
WILCOX-GAY
CORPORATION,
MAJESTIC
INTER-
NATIONAL
SALES CORP.
DIVISION
743 N. LaSalle St.
Chicago 10, Illinois
"Ekotape"
Model 310
A-V Control
Center
$399.50
Frequency
Response
30-15,000
cycles at
7 y, "/ sec.
as above
"Ekotape"
Model 340
Stereo Deck
$99.50
Model 342
Stereo Deck
$119.50
STERecordio
Model 800
Stereo Portable
$319.95
Speaker
$69.95
Stereo Record
Amplifier
$89.95
WOLLENSACK
OPTICAL
COMPANY
20 E. 21st St.
Chicago 16,
Illinois
Grundig
Majestic
Model
TK830W 3D
$399.95
Data
Portable, two-speed, dual-track recorder with monomatic
single-knob control. Meter type recording level indicator.
Power output, 8 watts max. Distortion, 1.6%. Total
harmonic at 6 watts, 400 cycles. Signal-to-noise, 43 db.
Wow and flutter, 0.2% max. at 7]/ 2 /sec. Odometer type
selection finder. Fast forward and rewind ratio, 15 to 1.
Two built-in speakers — 6" x 9" oval PM and 3" round.
External speaker jack and output for hi-fi preamp. Inputs
for microphone and radio-phono jack. Includes crystal
mike
11
and manual instant start-stop control. Dimensions-
131/2 x 15". Weight, 35 lbs.
Similar to Model 320 above, except designed for mon-
aural record/playback and stereophonic playback with
stacked heads. Includes two amplifiers for stereo play-
back — one used for half-track monaural record and
playback. Each amplifier has 12 watts maximum output.
Weight, 44 lbs. Matching stereo speaker cabinet, includ-
ing 6" x 9" oval and 3" round speaker, available at
$59.50.
as above
as above
40-15,000
cycles ( ~2 db)
at 7V 2 "/sec.
New audiovisual control center for use with any auto-
matic slide or strip film projector. Eliminates need for
audible signal. Has two recording heads that record over
full width of tape. One records from mike or radio. The
other records 1000-cycle signal that operates an auto-
matic projector. Two speeds: 7'/2 and 3J4 'P s - Other
specifications same as Model 3 20 above except for fol-
lowing: output, 12 watts: no preamp output jack: micro-
phone is accessory.
New tape decks for stereo recording and playback.
Speeds: 7'/2 and 3^4 'P s - Monomatic central control for
tape direction. Second control for speed selection and
on/off. Connections: two record/reproduce, two erase.
Automatic stop. Odometer type selection finder. Wow
and flutter: 0.2% at 7'/ 2 ips, 0.3% at zy 4 ips. Dimen-
sions: liy 4 x 9 x 7J/2". Model 340 does not have auto-
matic stop or selection finder. Stereo playback preamp for
Models 340 and 342 is $59.50. Stereo record-playback
preamp is $159.50.
New portable for monaural record-playback and stereo
playback plus stereo record with use of stereo recording
amplifier. Speeds: 7'/2 and ^Va ips. Push button controls.
Dual volume controls. Interlock prevents accidental erase.
Two neon recording level indicators. Two 5x7 oval
speakers. Fast forward and rewind: 1200 feet in 2% min.
Integral pointer selection finder. Wow and flutter: 0.3%
at 71/2 ips, 0.5% at i% ips. Signal-to-noise ratio: 35 db.
Outputs: two for external speakers. Inputs: microphone
and radio/phono plus special jacks for amplifier and bias
oscillator. Dimensions: 14'/> x 15'/ 7 x 12" Weizht-
35 lbs.
Model
T-1500
$199.50
Stereo Model
T- 1 500
$229.50
40-16,000
cycles ( =3 db)
at 71/5"/ sec.
50-10,000
cycles ( -3 db)
at 3% "/sec.
40-15,000
cycles ( =3 db)
at 7 1/2" /sec.
40-7,500
cycles ( -3 db)
of 3% /sec.
Portable, dual-track recorder with 3%" and 7I/2" tape
speeds. Magic eye recording level indicator. Tape coun-
ter, program index. Hysteresis synchronous motor. Flut-
ter and wow. less than 0.1% at 7l/2"/sec, less than
0.27c at 3%"/sec. Signal-to-noise ratio, 55 db. Harmonic
distortion, less than 1%. Fast forward and rewind ratio,
30:1. Power output, 6 watts undistorted. Three high-
impedance inputs, one high-impedance and one low-
lmpedance output. Includes three wide range PM loud-
speakers. Dimensions, 16" x 17" x 8". Weight, 35 lbs.
Portable, two-speed, dual track recorder with 10-watt
power output and interlocked kevboard control that can
be operated in any sequence. Flutter and wow, less than
0.3%. Signal-to-noise, 48 db. Overall distortion less than
0.8%. Fast forward and rewind, 150'7sec. Dual level
record indicator, revolution index counter in start stop
lever. Automatic drive roller release when power switch
is off. Pre-amp output for Hi-Fi system. Extension speaker
jack. Built-in automatic head demagnetization. Remote
foot control available. Weight, 18 lbs.
Stereo model is same as above with built-in lower channel
preamp added and without built-in automatic head
demagnetization.
All specifications and performance data on tape recorders listed in this directory are based on information supplied by the manufacturer. Performance data are
generally based on average values and individual machines sometimes vary widely from published figures, depending on the amount of quality control
exercised in manufacture.
Prices subject to change without notice. Consult manufacturer or local dealer for exact price, as some prices are list and others net.
20
AUDIO RECORD
October, 1958
Manufacturer
VIKING OF
MINNEAPOLIS
9600 Aldrich
Ave. So.,
Minneapolis 20,
Minnesota
V-M
CORPORATION
Benton Harbor,
Michigan
Model and Price
OCv. • c
a
a
"95" SERIES
Tape Deck
(Prices available
on request)
Frequency
Response
"Tape-O-Matic'
Portable
Model 710A
$189.95
WEBCOR, INC.
5610 West
Bloomingdale Ave.,
Chicago 39,
Illinois
"Tape-O-Matic"
Stereo /Playback
Portable
Model 714
$225.00
"Celeste"
Stereo /Playback
Table
Model 750A
$275.00
Webcor
"Regent"
Model 2910
$159.95
Model 2820
$199.95
Dependent upon
type of
heads supplied
Data
40-15,000
cycles (±5 db)
at 7 '/j 7 sec.
40-15,000
cycles (±5 db)
at 7y, "/sec.
Webcor
"Royal"
Model 2911
$199.95
Model 2821
$239.95
Model 4820
(Speaker)
$79.50
Model 2991
$239.95
Webcor
"Imperial"
Model 2827
$319.95
Model 4728
(Speaker)
$119.95
Webcor
'Royal Coronet"
Model 2822
$289.95
Model 2955
$249.95
Model 2923
$289.95
Model 4923
(Speaker)
$139.95
50-12,000
cycles at
7'/,7sec.
70-7,000
cycles at
3% "/sec.
Broadcast type recorder designed for professional appli'
cations. Available with any of three drive pulleys: 15 —
Wll 71/2 — 3%; or iy 4 — V/s ips. Three motors:
hysteresis synchronous drive; 6-pole induction torque
motors. Space for six interchangeable heads allows head
configurations for any tape application. Rewind and fast
forward time, 70 sec, for 2400 feet tape. Instantaneous
dynamic braking, less than 2 sec, from fast forward or
fast rewind. Signal-to-noise ratio: 55 db or better. Wow
and flutter: less than 0.1% at 15 ips, less than 0.15%
at 7J/2 ips rms. Deck is available with matching VU
Record /Playback Amplifiers, for rack mounting.
Portable, dual-track recorder with 3%" and 7]/2"/sec.
tape speeds and push-button control of all operating
functions. Convertible to stereo playback. Power output,
8 watts. Signal-to-noise ratio, better than 45 db. Less
than 0.4% RMS flutter and wow. Cathoptic tuning eye,
automatic shut-off, and monitor switch. Concealed 60-
cycle hum control and noise balance control. Two
built-in speakers. Jacks for external amplifier, two-way
external and stereo output. Separate bass and treble
control, microphone and phono adapter plug included.
Shipping weight, approx. 32 lbs.
Portable, two-speed dual-track stereo recorder. "Stacked-
staggered" stereo playback switch. Monaural record /play-
back. Power output, 8 watts. Signal-to-noise, better than
45 db. Flutter and wow less than 0.5% RMS. Cathop-
tic tuning eye and automatic shut-off. Two speakers,
external amplifier jack, two-way external speaker jack,
stereomatic output receptacles. A.C. receptacle. Inter-
locked push-button controls. Instant pause switch, moni-
tor switch and tape index counter. Separate bass and
treble controls. Weight: 32 lbs.
Model 750A is a two-speed dual track stereo recorder,
similar to Model 714, except with two 8" woofers and a
3.5" tweeter. Blonde or mahogany cabinets. Optional
legs convert it to consolette. Weight: 45 lbs.
50-12,000
cycles at
7V,"/sec.
70-7,000
cycles at
3%7sec.
(as above)
40-15,000
cycles at
7i/ 2 '7sec.
50-10,000
cycles at
3% 7 sec.
Model 2810 — Portable dual track recorder. Speeds:
'! / 2. 3% and 1% ips. Amplifier has five watts peak
power. 5" x 7" permanent magnet oval speaker. Signal-
to-noise ratio: 45 db. Wow and flutter less than 0.4%.
Four-pole motor, numerical tape counter, editing key,
recording level indicator, monitor control. Jacks for
input, external amplifier, external speaker. Weight: 34 lbs.
Model 2820 — same, except with separate pre-amplifier
for stereo playback. Additional stereo speaker system
required.
Model 2911 — Same as Model 2810 except for two
speeds (7J/2 and 3^4 ips); "No reel turnover" feature
that plays 3, 5 or 7-inch reels in two directions, with
head transfer for track change; two speakers: 5" x 7"
woofer and 4" tweeter; two recording heads, two four-
pole motors; four-way master control.
Model 2821 — same, except with separate pre-amplifier
for stereo playback. Model 4820 stereo speaker system
required.
Model 2991 — same as 2911, except with built-in AM
radio tuner. Radio may be used independent of recorder.
Model 2827 — similar to Model 2821, except with 8-watt
peak power amplifier, built-in preamplifier for stereo-
phonic playback using a separate two-section speaker
system, Model 4728. Recorder includes built-in 5" moni-
tor speaker. Two recording heads; one monaural rec-
ord/playback head, the other a stacked monaural and
stereo playback head.
Model 2822 — Same as Model 2821, except with 8-watt
peak power amplifier and three speakers — one 6" x 9"
woofer and two 4" tweeters. Weight, 51 lbs.
Model 2955 is same as Model 2822 except for additional
speed: l^g ips. Has 5-watt amplifier output, in consol-
ette cabinet. Add $10.00 for limed oak, maple or wal-
nut finish. Uses Model 4923 speaker system. Add $10.00
to speaker price for limed oak or cherry finish.
Model 2923 is same as Model 2955 except in console
cabinet. Add $10.00 for limed oak or cherry finish.
Manufacturer
AUDIO-
MASTER
CORP.
17 East 45th St.
New York 17,
N. Y.
Model and Price
Butoba
Portable Recorder
$345.00
Frequency
Response
50-9,000
cycles
(±3db)
Selectophon
Tape-Record-Player
$379.50
PERFECTONE
Continuous Tape
Player
S730-S830
AUDIOMATION
LABORATORIES
7230 Clinton Rd.
Upper Darby 23,
Pa.
BELL &
HOWELL
COMPANY
7100 McCormick
Road
Chicago 45, III.
CONCERTCASTER
Including
Perfectone and
amplifier
S835-S1010
40-12,000
cycles
(±2 db)
40-15,000
cycles at
7 y, 7 sec.
40-8,000
cycles at
3 y 4 "/sec.
Data
Portable, transistorized, dual-track, battery-operated re-
corder with push-button controls. Driven by special
spring-wound motor with elapsed-time indicator. Tape
speeds: 3% and U/g. Running time is 20 and 40 minutes
respectively. Multi-purpose head: record and playback-
erase. Volume level indicator is magic eye tube. Play-
back through built-in oval speaker or external amplifier.
Telephone conversation recorder adapter optional.
Selectophon is a tape-record-player which records up to
6 hours on a 35 mm endless tape and plays 33, 45 and
78 rpm records. Built-in amplifier and speaker.
as above
y — ■ <*
— t * J
A**
—0
(Write to manufacturer for prices)
Model 600-M
Mahogany
$329.50
Model 600-B
Blond Oak
$344.50
Model 600-1
Plywood
$329.50
Heavy-duty rack type tape phonograph for providing
up to 8 hours of unattended, background music without
repetition. Two speeds. Automatic reversal and shut-off
with unmodified tape. Automatic, continuous re-cycling
or shut-off controlled by switch on panel. Simple con-
trols, light tape tension. Easy and precise head alignment.
Signal-to-noise, better than 50 db at 7J/27sec. Hysteresis
synchronous capstan motor and two 4-pole torque motors.
Max. reel size, 14". Price depends on type of amplifier
and number of speeds desirecf.
This is a complete package consisting of the Perfectone,
cabinet and power amplifier. The 7/32" crystal glass
cover rests on a sponge rubber gasket to exclude dirt and
dust. The mechanism pivots for easy access. Price de-
pends on number of speeds and type of amplifier desired.
as above
50-15,000
cycles at
7i/ 2 "/sec.
A. AUTOSPERSER
The new Autosperser has two Perfectone tape players,
a control panel for either wired or multiplex service, and
an Adcaster tape player for storecasting or similar special
services. The Adcaster provides up to 30 minutes of
recorded commercial on one track and automatically re-
winds and cues to first commercial when played through.
The twelve-station programming cycle repeats auto-
matically. Automatic standby.
New Autosperser-24 System available that is identical
to standard Autosperser System excepting control panel
has 24-station programming cycle.
B. CONSECUTOR
The Consecutor System is comprised of two Perfectone
8-hour machines and a control panel. For unattended
operation in broadcast or wired service. Operating cycle:
Machine #1 plays track A, reverses, plays track B, re-
verses, shuts off, starts machine #2. Machine #2 per-
forms same cycle and restarts machine #1. Automatic
standby. Provision for manual operation so that tapes
may be changed without interrupting program.
C. VARYTAPE
Consists of two identical Perfectone automatic 8-hour
tape-handling mechanisms arranged for unlimited varia-
tion of program continuity by the automatic inter-mixture
of the music content of any two reels. Automatically
stops one mechanism and starts the other whenever 30
seconds or more of silence occurs on the tape being
played. Permits up to 16 hours of music without repeti-
tion. Cycling fully automatic. Automatic standby.
New portable stereo recorder with 71/2 ips and 3% ips
speeds. Monaural record /playback and stereo play-
back. Twin built-in, extended-range, side-mounted 8"
speakers reproduce both monaural and stereo tapes.
Three-motor drive. Two-position selector dial for mon-
aural/stereo. Push button controls. Fast forward and
rewind. Twin record-level indicators. Resettable pro-
gram indicator. Wow and flutter less than 0.2% at V/2
ips. Harmonic distortion less than 1%. Signal-to-noise
ratio exceeds 40 db minimum. Cut-off mechanism auto-
matically stops reel at end of tape on record or playback.
Two inputs; microphone; radio/phonograph/TV. Two
outputs for external speakers. Weight: 45 lbs.
AUDIO RECORD
October. 1958
19
Manufacturer
BELL &
HOWELL
COMPANY
7100 McCormick
Road
Chicago 45, III.
Model and Price
Model 730GS
Stereo Portable
$269.50
Model 775G
Portable
$199.95
Model 770G
Monaural Portable
$169.95
Model 771
"Stereotone"
Stereo Portable
$199.95
Model 076318
Amplifier-speaker
$99.95
BELL SOUND
SYSTEMS, INC.
555 Marion Road
Columbus 7, Ohio
DAVID BOGEN
CO., INC.
P.O. Box 500
Paramus, N. J.
P100
Tape Transport
T210 $109.95
T211 $119.95
T212 $129.95
T213 $149.95
T216 $259.95
T218 $314.95
RP 120
Record / Playback
Pre-Amplifier
$59.95
Playback Pre-Amplifier
$39.95
Model BT-205-1B
Monaural Record
with inline
Stereo Playback
$224.50
Model T-207-S
Home
Stereo System
$695.50
Model TR-30 $449.50
Frequency
Response
50-15,000
cycles at
7Vi "/sec.
50-13,000
cycles ( =4 db)
at 7 y 2 "/sec.
as above
25-12,000
cycles (=2 db)
overall record-
playback extends to
15,000 cycles
playback only
30-12,000
cycles at
7 '//'/see.
as above
40-15,000
cycles at
157sec.
50-10,000
cycles at
7'/, "/sec.
Data
Manufacturer
Portable monaural recorder and playback instrument
equipped with stereophonic in-line playback head, stereo-
phonic output jack. Tape speeds: iy 2 or 3% >P S - Stereo-
phonic playback through companion amplifier speaker,
or radio, phonograph, TV with pre-amplifier. Round 10-
inch speaker positions 2 ways. Automatic reel stop.
3 -motor operations. Rewinds 1200 feet in 60 seconds.
Less than 3% distortion at 7 watts. Wow and flutter
below 0.2% maximum at 7\/ 2 ips. Signal-to-noise ratio
above 40 db minimum. Electromagnetic pushbutton con-
trols. Accidental erasure interlock. Accurate resettable
program indicator. External amplifier and speaker jacks.
Dimensions: 16'/" x 17" x 9y 2 ". Weight: 39 lbs.
Two-speed, dual track portable tape recorder taking
reels up to 7" diam. Five-button control. Two 5'/4"
speakers. Three-position switch for normal, monitor or
public address operation. Runs at 7\/ 2 " or 3J4" speeds.
Twin-level recording guides. Special pause control
eliminates usual clicks when starting or stopping. Single
knob for tone control. 5-watt amplifier. Distortion less
than 1%. Signal-to-noise ratio more than 40 db. Wow
and flutter less than 0.5% at 7l/ 2 '7sec. Weight: 38 lbs.
Two-speed, dual track monaural portable. Five push-
button controls. Two 51/^-inch speakers. Tape speeds:
7'/2 and 1% ips. Recording level guide. Play and Record
pushbuttons interlocked to prevent accidental erasures.
Fast rewind: 1200 feet in 80 seconds. Distortion less
than 1%. Signal-to-noise ratio more than 40 db. Wow
and flutter less than .5%. Input for microphone, radio,
phonograph or TV. Output jack for external speaker.
Dimensions: 10" x 15l/ 2 " x 15J4". Weight 33 lbs.
Model 771 is same as above except for stereo playback
head. Has three output jacks: for stereo playback through
0763 18 amplifier-speaker, for monaural playback through
external speaker, for monaural playback through 076318
amplifier-speaker.
A basic tape transport providing almost unlimited flexibil-
ity. Three motors. Two speeds: iy 2 and i%. Signal-
to-noise ratio is better than 50 db. Flutter less than
0.25%. Distortion less than 1%. Has index counter,
power off-on switch, piano-key controls, micro-switch
automatic stop. Available in following combinations:
T-210: monaural record/playback; T-211: monaural
and stereo playback; T-212: monaural record /playback
and stereo playback: T-213: monaural record /playback
and stereo record/playback; (above models require
matching pre-amplifiers): T-216: incorporates Model
T-212 with P-100 and RP-120 in portable carrying case.
Model 218 stereo recorder incorporates T-213 and
2 RP-120 in portable carrying case.
New 3 -motor, dual track portable tape recorder. Two
speeds, 7 J/J a "d 3fi- Has positive braking, and piano-
key controls. Power output is 5 watts. Tape lifter removes
tape from heads during Stop and High Speeds. Wow and
flutter is less than 0.25% at 7'/2 ips. Automatic interlock
prevents accidental erasure. Original equipment includes
microphone, empty 5" reel and full reel of tape.
New home stereo system that includes stereo /monaural
tape recorder and two matching amplifier-speakers. Tape
speeds: 7y 2 and 3% ips. Electro-mechanical keyboard
controls. Stereo switch for inline or offset. VU index
counter. Three-motor direct drive. Positive braking.
Wow and flutter less than 0.2%. Signal-to-noise ratio
better than 50 db. Two twin cone 8" wide range speakers.
Inputs: two microphone, two radio/phono. Outputs:
four 4-, 8-, 16-ohms, high impedance, one AC outlet.
Recorder in portable case weighs 52 lbs.
New low-cost professional type monaural/stereo play-
back recording unit. Has direct-drive hysteresis syn-
chronous capstan motor and two torque motors; dynamic
braking. Two speeds: 15 and l]/ 2 'P s - Other features
are: push button function switches, slot loading, auto-
matic tape lift in high speed, three separate heads, two
self-contained pre-amplifiers (one converts from record
to play for stereo playback), volume level meter, micro-
phone and tuner inputs, earphone monitor jack. Wow
and flutter is 0.2% at 15 ips. Signal-to-noise is 50 db.
Panel size is 19" x 12'/^".
TELECTRO-
SONIC
CORPORATION
35-18 37th St.
Long Island City 1,
New York
TRUVOX LTD.
Truvox (U.S.A.)
Ltd.
275 Seventh Ave.
New York 1,
New York
VIKING OF
MINNEAPOLIS
9600 Aldrich
Ave., So.
Minneapolis 20,
Minn.
Model and Price
Telectro
Model 1980
Stereo Playback
Unit
$99.95
Telectro
Model 300
Stereo Portable
$189.95
Model 350
Portable
$149.95
Mark IV
Tape Deck
TR-2106
$199.50
TR-2116
$2 1 5.00
Type "K"
Record-Playback
Amplifier $109.50
Viking
75 Series
Tape
Decks
Model FF75R-LP.
Monaural Record/
Playback $ 78.50
Model FF75RM-LP. Monaural Erase/
Record /Monitor 87.00
Model FF75SR. Monaural Erase/
Record, Stereo Playback 113.00
Model FF75ES. Stereo (In-Line) Erase/
Record and Playback 1 13.00
99.00
Model 85P. Monaural Playback
Model 85R. Monaural Record
Playback 108.50
Model 85RQ. Monaural Erase/
Record, Stereo Playback 132.50
Model 85SR. Monaural Erase/
Record, Stereo Playback 143.00
Model 85SRO. Monaural Erase/Record,
Four-Channel Stereo Playback 167.00
Model 85ES. Monaural-Stereo Erase/
Record; Playback 143.00
Model 85ESQ. Monaural Four-Channel
Stereo Erase Record Playback 167.00
RP61 Record Playback Amplifier $ 77.50
RP61VU Record; Playback Amplifier 119.00
PB60 Playback Preamplifier 29.50
Viking
Endless Play
Cartridge
Recorder
35P $60.00
35R $67.00
(other models available by request)
Frequency
Response
50-15,000
cycles at
7'/, "/see.
50-15,000
cycles at
7Vj"/see.
40-15,000
cycles ( =3 db)
at 7'/," 'sec.
30-15,000
cycles ( -2 db)
at 7Vj" /sec.
30-15,000
cycles ( -2 db)
at 7'/j "/sec.
40-14,000
cycles at
7y,"/sec.
40-7,000
cycles at
33/ 4 "/sec.
Data
New playback unit for both dual-track and four-track
stereo and dual-track monaural. Separate volume and
tone controls for each amplifier. Fast Forward and Re-
wind. Pilot light indicates when set is in operation. Four-
pole motor. Inputs: two for connecting kit that converts
any monaural phonograph into stereo disc system. Out-
puts: two for external speakers/amplifiers. Signal-to-
noise ratio: 45 db. Output is 6 watts peak from each
amplifier. Distortion is less than 2.0%. Dimensions:
15" x 8I/2" x HI/2". Weight: 20 lbs.
New tape recorder for two- and four-track stereo play-
back and monaural record/playback. Speeds: 1]/ 2 , 3%
and 1% ips. Pushbutton controls. Digital counter. Auto-
matic shut-off. Record and record level indicator. Three-
way speaker system. Equalization switch. Inputs: micro-
phone, radio/phono/TV. Outputs: two for external
speaker /amplifiers. Signal-to-noise ratio: 45 db. Power
output: 8 watts peak from each amplifier. Distortion less
than 2.0%. Dimensions: 16" x 10" x 14". Weight: 29 lbs.
Model 3 50 is monaural. Same as above except for single
pre-amp and power amp with push-pull output of 8 watts.
Dual track, dual speed. TR-2106 with timing scale.
TR-2116 with precision index counter, both fitted with
stacked stereo head. With suitable electronics for mon-
aural record /playback plus stereo playback or monaural
record /playback plus stereo record/playback (half-track
erase head requires raw tape). 3 shaded pole B.T.H.
motors. Wow and flutter: less than 0.2% at 7J/2 ips.
Push button operation, electrical braking, high speed re-
wind (45 sec. for 7" reel). Automatic tape lifter. Dimen-
sions: 14!4" x 12-13/16" x 5". Weight 14j/ 2 lbs.
Component tape deck offered with a wide variety of
interchangeable head assemblies. Features flutter-filter belt
drive. Wow and flutter 0.2% rms. Front panel speed
change, 3% and IVi ips. Split-knob position shift for
record/play, fast forward and rewind. For playback, re-
quires preamplifier with low level tape input and NAB
equalization. For recording, requires Viking RP61 or
equivalent matched record/playback amplifier. (Two
RP61 amplifiers and stereo deck serve for stereo record-
ing). All Viking decks may be modified through addition
of heads and brackets to provide same functions as other
models listed. Decks accommodate three heads and are
also available with the quarter track head configuration.
IV/e," x 8%" x 5" deep. 115V., 60 cycles A-C. (50
cycle models also available). Weight 11 lbs.
The finest home type tape deck in the Viking line. Flut-
ter-filter belt drive. Two motors providing fast forward
and rewind. Front panel speed change, 3% and l]/ 2 ips.
Dual rotary control. Inner ring selects "fast forward" and
"fast rewind." Outer knob selects normal forward, stop
and cue (edit). Footage counter. Space for five heads.
Pressure pads provided at three head positions. Tape-
lifters remove tape from heads except in play and "cue"
positions. Short-gap record /playback heads. Ultra-short
gap quarter-track in-line head for the new i% ips tapes
are available. See "Q" models. Signal-to-noise ratio 50
db. Wow and flutter 0.2 percent or less rms. Use with
RP61 Record /Playback amplifiers for recording. Use
PB60 preamplifier or amplifier having equivalent (NAB)
tape equalization. Tapes recorded on Viking may be
played back on any machine having standard NAB
equalization. 1 lOv, 60 cycles. (50 cycle models available.)
(All 85 Series Viking decks are flexible in that heads
may be added to provide special functions such as sound-
on-sound recording, stereo monitoring, language teach-
ing, etc.) Dimensions: 9Y 2 " x 13" x 5". Weight 12 lbs.
RP61 record/playback amplifier matches all Series 75
and 85 tape decks above. PP61VU is the same as the
RP61 but has a VU meter instead of "Magic eye."
Portable handler for use with Fidelipac continuous loop
tape cartridges holding up to 1600 feet of tape. Single
lever control. Speed change control for 3% or 7'/8 ips
tape speeds. 115v, 60 cycle A-C motor (50 cycle motor
available). Accommodates one or two PB60 Pre-ampli-
fiers, or PA62 combination preamp-amplifier, or RP61
Record /Playback Amplifier. 10'/ 2 " * 9%" x V/ 4 "
mounted in case. Weight 5 lbs.
Model 3 5P is monaural half-track playback only,
mounted in case. Model 3 5R is monaural half-track rec-
ord/plavback/erase, mounted in case.
18
AUDIO RECORD
October, 1958
Manufacturer
SYMPHONIC
RADIO &
ELECTRONIC
CORP.
10 Columbus Circle
New York 19,
New York
TANDBERG OF
AMERICA, INC.
10 E. 52nd St.
New York, N. Y.
Model and Price
Model 300 Stereo Re-
corder and Speaker $249.95
Frequency
Response
80-12,000
cycles at
7 V, 7 sec.
Model 2
$249.50
Model 3B
$299.50
Model 3BF
$349.50
Model 2F
$299.50
Model 3-STEREO
$369.50
TELECTRO
INDUSTRIES
CORP.
35-16 37th St.
Long Island City 1,
New York
TELECTRO-
SONIC
CORPORATION
35-18 37th St.
Long Island City 1,
New York
Model 3
STEREO-4T
$379.50
Model 4-STEREO
$349.50
Model 5-STEREO
$399.50
Telectro
Model
938
Price on
Request
Telectro
14" Tape
Transport
Price on
Request
Telectro
Model 1970
$99.95
Telectro
Model 1960
$79.95
30-10,000 cycles
at 3 3/ 4 7 sec.
30-6,500 cycles
at 1 V 8 "/sec.
Data
New tape recorder and speaker combination for stereo
playback, monaural record/playback. Speeds: 7^2 ar >d
3 54 ips. Two speakers in recorder. Push button controls.
Tape index timer. Recording level indicators. Automatic
end-of-reel shutoff. Monitor switch. Pause button. Safety
switch prevents accidental erase. Output: J watts undis-
torted, 5 watts peak. Wow and flutter: less than 0.4%
RMS. Input: microphone and radio/TV/phono. Out-
puts: two for external speakers. Dimensions: 10" x \^V 2 "
x 15". Weight: 36 lbs.
Portable, dual-track recorder with speeds of V/i and
3% ip s - Precision Laminar Heads, Microphone, radio/
phono inputs; DAMPED Electronic eye recording indi-
cator, clock-type counter, Goodman 5J/2" x 8" speaker.
Wow and flutter below .2% at 3% ips, .25% at 1% ips.
Signal-to-noise ratio: 57 db at 324 'P s - 3.5 watts out-
put, distortion under 1%.
30-20,000 cycles
at 7 1/, 7 sec.
30-12,000 cycles
at 3% "/sec.
30-6,500 cycles
at 17, "/sec.
30-10,000
cycles (-2 db)
at 7'/, 7 sec.
30-15,000
cycles (±2 db)
at 7V, "/sec.
Flat to
about
8,500
cycles at
7 V, "/sec.
100-10,000
cycles at
7i/j" sec.
Model 3B is the same as Model 2, except 3 speeds (1%
ips, 3% ips and 7'/2 ips) and improved performance.
NARTB Equalization, Wow and flutter below 0.1% at
7J/2 ips, Signal-to-noise ratio: 60 db at 1\/ 2 "/sec. Auto-
matic tape stop and BASS switch feature. Frequency
response: 30 to 17,000 cycles at 7J/2 ips.
Models 3BF and 2F are solenoid operated versions of
Model 3 and Model 2, same specifications, functions,
except operates remotely thru a supplied foot pedal.
Model 3 -Stereo is the same as Model 3B, except it has a
stereo head and two power playback amplifiers built-in
for playback of stereo tapes.
Model 3-Stereo-4T is the same as Model 3 -Stereo except
it has Four-Track Stereo head to playback four track
monaural and new 3% ips. Stereo twin tracks.
Model 4-Stereo is the same as Model 3B, except it is 4-
track monaural record-playback and stereo twin track
playback, one stereo power amplifier and second channel
stereo preamplifier built-in (requires one external power
amplifier for stereo playback); dual track erase.
Model 5 -Stereo has four-track record /playback, stereo
twin track playback, two power amplifiers built-in, sep-
arate gain controls for each channel. Same specifications
as Model 3-Stereo-4T. Accommodates #241 Stereo Re-
cording Amplifier to record stereo.
Professional-type recorder for portable or rack mounting.
Also available in console cabinet. Plug-in head assembly
— single or dual track. Two speeds — 7 , /^"/sec. and
15"/sec. Wow and flutter, less than 0.2% at lYz'/sec,
less than 0.15% at 15"/sec. Distortion, less than 0.2%
RMS at maximum recording level. Signal-to-noise, over
55 db at both speeds. VU meter. Adjustable bias. Micro-
phone, bridge and line inputs. Outputs, 600 ohms bal-
anced; monitor jacks for power amplifier and headset.
Fast forward and rewind, less than 1 min. Playback tim-
ing accuracy, better than 0.2%.
Professional tape transport for rack or portable-case
mounting. Constant-speed hysteresis synchronous motor
drive, with torque motors for supply and take-up reels.
Speeds, 7\/ 2 " and 15"/sec. Starting time, less than 0.1
sec. Stopping time, less than 2" at 15"/ sec. Timing ac-
curacy, better than 0.2%. Fast forward and rewind, less
than 1 min. for 14" reel. Wow and flutter, less than
0.15% at 15"/sec. Plug-in head assembly — 3 heads
single or dual track. Push-button relay operation, editing
knobs, automatic shut-off. Solenoid brakes.
Model 1960. Portable, dual track recorder with 3%" and
7J/2" tape speeds. Push-button speed control and single
knob control for record and playback. Neon record-level
indicator. Built-in 6" speaker. Patch cord available for
direct recording from radio-phono. Weight, 15 lbs.
Model 1970. New two speed tape recorder. Speeds: 7'/2
and 3% >P S - Single-knob function control for Record and
Play. Fast Forward-Rewind switch. Interlock prevents
accidental erase. Two speakers. Output: 5 watts peak.
Input: microphone, radio, TV, phono. Output: external
speaker. Dimensions: 15" x 8" x HI/2". Weight: 19 lbs.
Manufacturer
BROADCAST
EQUIPMENT
SPECIALTIES
CORP.
P.O. Box 149
Beacon, N. Y.
CAPITAL
RECORDS, INC.
Hollywood
and Vine
Hollywood 28,
California
COLUMBIA
RECORDS, INC.
799 Seventh
Avenue,
New York 19,
N. Y.
De JUR
AMSCO
CORP.
45-01 Northern
Blvd.,
Long Island
City 1, N. Y.
DELMONICO
INTER-
NATIONAL
42-24 Orchard St.
Long Island
City, New York
Model and Price
Tapak
(tape-pack)
Duplex
Musicale
$389.25
Duplex
Newscaster
$349.50
Triplex
Musicale
$438.75
Triplex
Newscaster
$399.75
Simplex
Newscaster
$289.50
Pocketape
$349.50
Frequency
Response
100-9,000
cycles at
71/T/sec.
as above
as above
Data
The spring-powered equivalent of conventional electric
tape recorders featuring the new Gyro Drive mechanical
wow and flutter filter for recording serious music. Re-
cords, erases, monitors, rewinds at high speed, plays
back through built-in 4" x 6" loudspeaker, or will feed
an external amplifier or public address system. Has
unitized amplifier with transistorized AC bias oscillator
for low battery drain and extended frequency range.
Speed 7I/2" per second. Range 55-58 db.
Newscaster is same as Duplex Musicale without Gyro
Drive. Speed l\/ 2 " per second (3J4" optional).
Same as Duplex Musicale with the addition of a VU
meter and 600 ohm output. Serves as a line preampli-
fier for microphone, or plays back tapes to line at zero
level. Speed 7'/2" per second. Range 5 5-58 db.
as above
100-6,000
cycles at
7 y, 7 sec.
150-6,000 cycles
at 7 1/, "/sec.
150-4,000 cycles
at 3 % "/sec.
1 50-3,000 cycles
at l%'7sec.
Model 850
Stereo Portable
$249.95
Portable Stereo Recorder
Model 570 $249.95
Portable Stereo Recorder
Model 575 $329.95
Stenorette
Dictating and
Transcribing
Machine
$179.50
Saja MK-5
Portable Recorder
$129.95
80-12,000
cycles (±5 db)
at 71/, "/sec.
60-12,000
cycles at
7 y, 7 sec.
50-14,000
cycles at
7 y, 7 sec.
ample for
voice
communication
50-16,000
cycles at
7i/ 2 "/sec.
Newscaster is same as Triplex Musicale without Gyro
Drive. Speed iy 2 " per second (3%" optional).
The budget Tapak for general use. Records, rewinds
at high speed, crystal microphone doubles as listening
device, feeds external amplifier or phonograph input of
radio for speaker reproduction. Recording characteristics
for NARTB on studio equipment or home recorders.
Speed 7J/2" per second (3J4" optional). Range 35-40 db.
Pocket-size compatible subminiature transistor tape
recorder-reproducer. "Investigator" model records at
changeable speeds of l 7 /$ or 1% ips on dual tracks total-
ing 2 hours or 1 hour respectively on 600' of J/4" tape.
"Broadcaster" model records 90-mil track at 7*/2 ips for
15 continuous minutes. Erases, records, rewinds instantly
and plays back. Interlocks prevent mistakes. Microphone
doubles as listening device. Signal-to-noise ratio: 50 db.
Motion at 7J/2 ips suitable for music. Twelve hour motor
batteries. Size: V/ 2 " x 4 l / 2 " x 6%". Weight: 2 lbs.
New portable tape recorder complete with two external
speakers. Records monaurally, plays back monaural and
stereo tapes. Speeds: 7]/ 2 and 3% ips. Push-button con-
trols. Stereo balance and hum balance adjustments.
Monitor switch, tape runout switch and recording safety
lock. Wow and flutter is less than .3%. Signal-to-noise
ratio is 42 db. Peak power output: 5 watts/channel. Two
external speaker outputs; two inputs for radio-phono and
microphone. Dimensions: 15J/2" x HYs" x 9|/g".
Weight: 42 lbs.
Complete portable stereophonic playback and monaural
recorder with in-line heads. Consists of two matching
units, one containing two amplifiers and one set of speak-
ers and the other containing one set of speakers and
storage space for tapes. Push-button control with neon
level indicators for recording. Each amplifier capable of
3 watts undistorted, for a total of 6 watts of output.
Contains two 7" oval speakers and two 4" tweeters. Tape
index counter, balancing control and automatic shut-off
after completion of tape. Microphone and balancing tape
provided with each unit. Cases covered with saddle
stitched, washable vinyl.
Amplifiers have total output of 1 5 watts. Contains two
8" speakers and two 4" tweeters. Cases are covered with
Neolite. Otherwise same as above.
A dictating transcribing machine that uses "Mylar"
magnetic tape. Push-button controls. Duplicate set of
controls on microphone/speaker for start, stop, auto-
matic review, electronic erase and correction. Functions
perfectly in a moving car (with transformer). Has built-in
conference setting for recording groups. Recording time
— 30 minutes per reel. Transcription accessories — foot
pedal control or typewriter control — features remote
control backspacer for quick review. Dimensions: 11 Yl
x 9Y 2 x 41/2. Weight: 12 lbs.
New two-speed West German portable recorder. Speeds
are 7J/2 and 3% ips. Two speakers. Illuminated function
indicators. Single knob control. Double effect button for
recording over a recording. Automatic end-of-tape shut-
off. Magic eye record level indicator. Pause control for
record and playback. Lock prevents accidental erase.
Dimensions: 15%" x \2%" x 7". Weight: 40 lbs.
AUDIO RECORD
October, 1958
17
Manufacturer
DICTAPHONE
CORPORATION
420 Lexington
Avenue
New York 17,
N. Y.
ELECTRONIC
APPLICATIONS
194 Richmond Hill
Avenue
Stamford, Conn.
Model and Price
Dictet
Portable
Recorder
$294.00
Dictatape
Continuous
Recorder
$3200.00
ReVox C36-2K
Monaural Portable
$349.00
Model C-362S
Stereo Portable
$399.00
Frequency
Response
200-4,000
cycles
300-2,700
cycles (±3 db)
at l%7sec.
NAGRA III B, C, E
(Prices depending
on model)
$600.00
to
$850.00
ELECTRONIC
TEACHING
LABORA-
TORIES, INC.
1818 M St., N. W.
Washington 6,
D. C.
FAMOUS
MODEL
CO., INC.
Melbourne, Fla.
MONITOR
2-Channel
Portable
Model E-3
$297.08
Model E-3C
Console
$280.07
Model E-3CS
Console
$273.05
MONITORET
2-Channel
Recorder
Model E-4
$247.00
Privateer
Mark VIM
$379.00
40-12,000
cycles
{ + 1— 2db)
15,000
—3 db max.
at 7y 2 "/sec.
50-8,000
cycles
at 3% "/sec.
30-15,000
cycles (±2 db)
at 15 "/sec.
40-12,000
cycles (±2 db)
at 7 '/ 2 7 sec.
50-8,000 cycles
at 3% "/sec.
Data
Miniature, dual-track, magazine loaded, magnesium case
tape recorder. Powered by two 7'volt mercury batteries
for motor, and separate battery for transistor amplifier.
Battery life: 20 hours for motor, 40 for amplifier. Battery
life indicators. Magazine has self-adjusting spindles;
automatic stop at end of reel. Records at 2J/2 ips; 30
minutes recording time on each side of magazine. Wow
and flutter: 2.25%. Signal-to-noise: 45 db. Magnetic
microphone is both microphone and monitor speaker.
Motor operates only when mike is plugged in. Dimen-
sions: 2' x 4I/2" x 6J4". Weight: 2 lbs. 11 oz.
Multi-channel recorder that permits simultaneous record-
ing of four separate signals on a standard J4" magnetic
tape. Up to 16 hours continuous unattended recording.
Speed: V/i ips. Instant start and stop. Six motors. Sep-
arate reproduce heads and amplifier provide playback on
either unit while recording. Automatic safeguards pre-
vent accidental erase. Harmonic distortion: 5% or less
at 1,000 cps. Flutter: 1%. Fast forward and rewind.
Single or dual track models; two speeds 3^4 and 7 J/J ips,
portable; three motors; separate recording and playback
amplifiers; wow and flutter at 7 J/J ips .15-. 20% max.;
signal to noise 50 db or better at normal levels; 3.5-watt
amplifier; 8" coaxial speaker; push button operation;
tuning eye recording level indicator; tape counter; end-
of-tape switch-off; connections for external speaker, am-
plifier, or remote control; up to 10" reels; dimensions:
18J/J," x ll^e" x 13%"; weight: 46 lbs.
Model C-36 2S is same as above plus stereo playback;
equalized outputs from both channels; cathode followers;
no speakers contained.
Portable, professional, completely transistorized unit,
available as model B with three speeds (3%, 7J/J and
1 5 ips) and as model E at 7 J/J ips. Type B and E contain
three heads, model III C has two heads. Speed constancy
0.2% or better; wow and flutter 0.1% at 15 ips or 0.2%
at 7J/J ips; signal to noise 55 db or better; meter for
battery condition and level; outputs 3 volts at 600 ohms
balanced; self-contained monitor speaker; "speech" filter
built in; all normal mike inputs plus 2 line mixers; motor
speed servo-controlled; operates from any 12 volt source
or self-contained batteries. Accessories available.
Prices depending on model: $600.00 to $850.00.
50-9,000
cycles (±3 db)
at 3%"/sec.
as above
to 3,500
cycles at
l%"/*ec.
Professional language laboratory recorder, dual track,
unique "split" amplifier performs simultaneous playback
and recording function on separate tracks, distinctive
in aural/oral laboratory work. Selector switch modes for
listen/record, dual playback, master record, master play,
duplicate. Volume level meter, separate record /play
heads with azimuth adjustment, bias 60KC, signal to
noise 45 db or over at 3% harmonic distortion. Model
E-3C for console mounting, all components mounted on
Yh" aluminum panel, size 19 x 11 x 5%, weight 15 lbs.
Special feature: multiple installations have remote con-
trol tape duplication facility. Model E-3CS is same as
Model E-3C except for omission of master record and
master play selector switch modes.
Language laboratory recorder, dual parallel tracks, a
"stripped-down" version of Monitor E-3 with same
characteristics except only two selector switch modes
for listen/ record and dual playback. Model E-4C for
console mounting.
Portable dual track tape recorder, self-contained recharge-
able batteries. Rewind electric. No batteries to replace.
Battery charger separate unit but included in price. Units
may be operated in covert fashion in briefcase from
external concealed switch and making use of external
concealed microphone. Available accessories include in-
put level indicator, headset, external microphone, tele-
phone recording adaptor.
Manufacturer
REVERE
CAMERA
COMPANY
320 East 21st St.
Chicago 16,111.
Model and Price
Model T-100
$169.50
Model TR-200
(with radio)
$224.50
Model T-500
$179.50
Model TR-600
(with radio)
$234.50
Model T- 11
$284.50
ROBERTS
ELECTRONICS,
INC.
1028 N. LaBrea
Avenue
Hollywood 38,
Calif.
THE STANCIL-
HOFFMAN
CORP.
921 North
Highland Ave.
Hollywood 38,
Calif.
SUPERSCOPE,
INC.
8520 Tujunga
Avenue
Sun Valley, Calif.
Model 90 Monaural Recorder $299.50
Model 90-S Stereo Recorder $325.50
Model A -901 Stereo Amplifier $149.50
Minitape
Recorder
$494.00
SYLVANIA
ELECTRIC
PRODUCTS,
INC.
Radio & Television
Division
700 Ellicott Street
Batavia, N. Y.
SYMPHONIC
RADIO &
ELECTRONIC
CORP.
10 Columbus Circle
New York 19,
New York
Sterecorder Model 555-A
Stereo Recorder $595
Model DK 555-A Stereo Recorder $525
Model CSS-555-A Stereo System $775
Model PSC-2 1 2 Stereo Speaker System $ 1 89
Frequency
Response
85-7,500
cycles ( ±3 db)
at 3% "/sec.
100-5,000
cycles ( 3 db)
at l%"/ioc.
Data
Portable, dual-track recorder available in either 1% or
3% ips. tape speed. Signal-to-noise ratio, over 45 db at
either speed. Distortion, less than 1.5%. Rewind and
rapid forward: single knob control. Flutter less than
0.3%. Two level recording indicator. 5" x 7" Alnico V
speaker. Weight, 25 lbs.
40-16,000
cycles (±3db)
at 7'/, "/sec.
40-15,000
cycles (±3db)
«"* 7'/ 2 "/see.
40-7,500
cycles (±3 db)
at 3 3/4 "/sec.
flat to 10,000
cycles at 7y 2 "/sec.
flat to 5,000
cycles at 3% "/sec.
flat to 4,000
cycles at iy 8 "/sec.
Model 4901
Portable
Recorder
$199.95
Symphonic
Model 210
$149.95
30-16,000 cycles
at 7yi "/sec.
at 7y J "/sec.
50-12,000 cycles
cycles (±2 db)
at 7 '/ 2 7 sec.
30-10,000 cycles
at 3% "/sec.
High fidelity 10J/J" reel tape recorder for professional
use and custom installations. Guaranteed specifications,
signal-to-noise, over 50 db, wow and flutter less than
0.2%. Features: One volt cathode follower pre-amplifier
output. Monitor amplifier with 2J/J watt output. Adjust-
able 70 Kc bias-erase oscillator with indicator. Less than
J/J-second start and stop. Automatic head demagnetizing.
Precision revolution tape counter. Electrical remote with
automatic drive roller release.
Portable two-speed recorder with hysteresis synchronous
one-motor drive. Locking device prevents accidental
erasure. Digital index counter. Wow and flutter, 0.15%.
Signal-to-noise: 45 db. Wrap-around tape threading,
illuminated VU meter, low and high level inputs. Ex-
ternal output jack. Five-watt amplifier; 5" x 7" extended
range speaker. Dimensions: 16 x 14j/Jx9. Weight, 28 lbs.
Model 90-S has same specifications as above except for
following. Has stereo record /playback head. Frequency
response is ±2 db within the same limits. Has jacks for
low level, high impedance microphone input; high level
line input; auxiliary speaker or line output; input/output/
jacks for each record/play head 2 channels.
New version of the Minitape available at single tape
speeds of V/$, 3%, or 7J/J ips. Operates completely en-
closed. External pushbutton for start or stop. Warning
light for end of tape. Takes 5" reels, records up to two
hours continuously. Battery-operated. Automatic volume
control over a 40 db range. Does not contain amplifier/
speaker. External amplifier/speaker and other accessories
available. Dimensions of the Minitape: 9" x 12" x 5".
Weight, including battery: 13 lbs.
100-8,500
cycles at
7 y, 7 sec.
80-12,000
cycles at
7y,"/sec.
Portable stereo recording and playback system. Two
built-in pre-amp channels, 8 watts power peak per chan-
nel. Hysteresis synchronous drive motor utilizing ad-
vanced rim drive principle on dynamically balanced
flywheel. Two VU meters. Two high-impedance inputs
for microphones. Two high-impedance inputs for AM/
FM tuners or stereo dubbing. Two low-impedance
cathode follower pre-amp outputs. Two speaker outputs.
Binaural/monaural headphone monitor output. In tan-
taneous stop lever coupled to complete editing and cue-
ing facilities. Flutter and wow less than 0.2% at 7J/J
ips. Signal-to-noise ratio 50 db per channel. Dimensions:
19x16x11". Model DK-555-A is the same as Model
55 5-A without portable case, microphones or monitor
speaker. Model CSS-555-A consists of Model 555-A and
Model PSC-212. All series of the Model 555-A are
available with 4-track stereo reproducing head at an addi-
tional $75.00.
New dual speed monaural portable. Speeds: 7J/J and
3 24 ips. Four knob controls. Single wind and rewind
knob. Edit button. Recording level meter. Two speakers.
Illuminated dial indicates when amplifier is on. Record-
ing time indicator. Undistorted 2 watts peak. Signal-to-
noise ratio, 3.3 watts. Wow and flutter, 40 db. Output
for external speaker. Input for microphone and phono-
graph. Dimensions: 8" x 18" x 16". Weight: 30 lbs.
Portable dual-track recorder, 3J4" and 7J/J7sec, with
push-button control, "normal" and "distort" recording
level indicator and index timer. Wow and flutter, less
than 0.4% RMS. Power output, 3 watts undistorted, 5
watts peak. Two speakers — 5" x 7" woofer and 3.5"
tweeter. Inputs for microphone and radio-phono. Out-
puts for external speaker and external amplifier. PA
system use. Includes crystal mike. Weight, 35 lbs.
16
AUDIO RECORD
October, 1958
Manufacturer
REED
RESEARCH
INC.
1048 Potomac St.,
N.W.
Washington 7,
D. C.
Model and Price
Transcriber
Model K-3
$1,100
Educorder
Dual
Model M-6A
$335.00
REVERE
CAMERA
COMPANY
320 East 21st St.
Chicago 16, III.
Model T-202
Monaural Portable
$207.50
Model T-204
Stereo Portable
$237.50
Frequency
Response
depends
on tape
speed
70-7,500
cycles at
7% "I ft.
70-5,000
cycles at
3% "/see.
Model T-700D
$225.00
Model TR-800D
$275.00
Model T-700
$235.00
Model TR-800
$287.50
Model T-10
$245.00
Model TR-20
$297.50
Model T-700 B&M $245.00
Model TR-800 B&M (with radio) $297.50
Model T-10 B&M $255.00
Model TR-20 B&M (with radio) $307.50
Model T- 11 00
$169.50
Model TR-1200
(with radio)
$219.50
Model T-1120
Stereo
$199.50
Model T-900
$199.50
Model TR-1000
(with radio)
$224.50
40-15,000
cycles (±3 db)
at 7 y, 7 sec.
40-8,000
cycles (±3 db)
at 3% "/sec.
40-14,500
cycles ( ±3 db)
at 7 y, 7 see.
40-7,500
cycles (±3 db)
at 3 % "/sec.
80-8,000
cycles (±3 db)
at 3 V 4 "/sec.
60-15,000
cycles ( 3 db)
at 7'/, "/sec.
as above
75-12,000
cycles (±3 db)
at 7y,7sec.
85-7,000
cycles ( ±3 db)
at 3 % "/sec.
85-7,500
cycles ( =3 db)
at 3 % "/see.
Data
Manufacturer
A new concept in magnetic tape transcribing equipment.
Tape speed is continuously variable between two tenths
and thirty ips. Can playback any Ya" magnetic tape re-
corded on American or European tape recorders. Pas-
sages may be rapidly scanned or slowed down by flicking
a switch which doubles or halves the selected speed. Auto-
matic back-spacing. Single channel, in-line or staggered
binaural tapes can be played. Foot pedal control for
stopping, starting and rewinding tape. Signal-to-noise
ratio is better than 40 db. Wow and flutter is less than
0.5%. Weight, 46 lbs. Dimensions: 14" x 19" x ^Y 4 ".
Portable, two speed, two channel recorder with single
knob-control tape mechanism. Two separate record/re-
produce amplifiers and two separate record-play-erase
heads. Records or plays back both channels simultane-
ously or records on one while playing back the other.
Monitoring by headphones while recording. Signal-to-
noise, 40 db. Wow and flutter, 0.3% at 7!/ 2 "/sec. Fast
forward and rewind, 70 sec. for 1200 ft. Nominal 75
watt peak power from each channel. Two input connec-
tions. Three output connections: Channel 1, Channel 2
and Dual for binaural headphones. Includes headphones
and microphone. Weight 30 lbs.
New two speed portable recorder. Speeds: 7'/2 and 3J4
ips. Two matched speakers with cross-over network. Key-
board control. Automatic safety lock and warning light to
prevent accidental erase. Two-level record indicators.
Index counter. Automatic stop on tape runout. Appli-
ance power outlet. Drop-in loading head slot. Wow and
flutter less than 0.3%. Signal-to-noise ratio greater than
48 db. Model T-204 is the same as Model T-202 except
for the addition of stereo playback.
Portable dual track recorder available with either single
or dual speed. Convenient keyboard control, electrical
solenoid operated. Signal-to-noise ratio over 48 db on dual
speed machines and 50 db on single. Distortion less than
65% on normal levels. Rewind and fast forward speed,
170 ips. Flutter and wow less than 0.3%. Two neon lamps
for accurate level setting. Precision revolution index
counter, for instant location of recording. Can be op-
erated as a PA system. Provisions for electrical remote
controls.
Models TR-800D,
AM tuner.
TR-800 and TR-20 have built-in
Table models (as above) in solid blonde oak or solid
Honduras mahogany. Special pressure relief port for ex-
tended frequency range.
Portable dual track recorder available with either single
(3% >P S ) or dual (3j^-7'/2 ips.) speed. Signal-to-noise
ratio over 48 db on either machine. Distortion less than
1% at normal levels. Rewind and fast forward, 170 ips.
Flutter less than 0.3%. Single knob control automatically
returns to stop when power is turned off. Dual level indi-
cator. Revolution index counter. Instant stop button.
Two-speed knob can be changed while in any function.
Rugged fiberglass case. Two speakers. Can be operated
as a public address system. Weight, 28 lbs.
FAMOUS
MODEL
CO., INC.
Melbourne, Fla.
FEN-TONE
CORP.
106 Fifth Ave.,
New York 11,
N. Y.
FERROGRAPH
RECORDER
CO., LTD.
Sole U.S. Agents
ERCONA CORP.
16 W. 46 St.
New York 36,
N. Y.
FILNOR
PRODUCTS,
INC.
1 Park Avenue
New York 16,
N. Y.
Model and Price
777
Series
Battery
Portables
Tapo Model 777 (blue) $295.00
Traveler Model 777-1 (brown) 298.50
Tempo Model 777-2 (gray) 314.00
Mark IV (monaural)
$144.47
Fen-Tone
Brenell
Mark IV
Tape Deck
Mark IV B (stereo)
$182.87
Custom
Installation
Model 66 /N
(33/4-71/, ips)
$399.50
Model 66 /H
(7i/,-15 ips)
$425.00
Portable
Model 3A/N Model 3A/NH
(33/4.71/, ips) (7i/j-15 ips)
$379.50 $425.00
Stereo
Model 35/ N
(33/4.71/, ips)
$475.00
Stereo
Model 3S/H
(7i/,-15 ips)
$520.00
Stere-ad" Unit
$195.00
Model 88
Stereo record
and playback
$595.00
E.M.I.
Battery Portable
$395.00
Model L2A
(33/4 ips)
Model L2B
{7i/, ips)
Model L2C
(15 ips)
Teltape
Recorder
$29.95
Frequency
Response
to
cps
3,500 - l'/s'/sec.
6,000 - 3 s/, "/sec.
12,000 - 7y, "/sec.
30-15,000
cycles (±3 db)
at 15" /sec.
50-12,000
cycles ( 3 db)
at 71/, "/sec.
50-6,500
cycles ( ±3 db)
at 3 3/, "/sec.
40-15,000
cycles (±2 db)
at 15" /sec.
50-10,000
cycles (±2 db)
at 7V, "/sec.
Data
Portable dual track tape recorders with completely self-
contained battery powered tape transport, amplifier and
speaker for playback. Rechargeable battery cycle up to
eight hours depending on tape speed. Has self-contained
battery recharger. May be operated on 110 AC. Rewind
is electric: speed 10 to 1. Maximum reel size, 5". May
be operated with door open or closed. Monitors while
recording. Inputs for microphone and headphone moni-
toring. Crystal or ceramic microphone included. Acces-
sories include snap-on retractable legs, canvas carrying
case and shoulder strap. Weight 21 lbs. Size 6" x 10"
x 15".
Three-speed tape decks for monaural and stereophonic
record/playback, with three-motor drive. All mount up
to four heads with individual azimuth adjustment. Cap-
stan-sleeve speed change. Dual half-track operation for
up to 7" reels. Two-knob control, fully interlocked. Wow
and flutter, less than 0.2%. Fast forward and rewind,
45 sec. for 1200 ft. Monaural deck can be converted to
stereo or sound-on-sound recording by installing addi-
tional heads. Can be used with PRO-2 amplifier.
as above
40-15,000
cycles (±2 db)
at 15" /sec.
50-10,000
cycles (±2 db)
at 7V, "/sec.
50-7,000
cycles (±2 db)
at 15 7 sec.
50-5,000
cycles (±2 db)
at 7V, "/sec.
50-2,500
cycles (±2 db)
at 3 3/4 "/sec.
to 4,000
cycles
Dual-speed, dual-track recorders for portable or custom
installation, manufactured by British Ferrograph Re-
corder Co., Ltd. of London. Accommodates up to 8'/4"
reels. Signal-to-noise ratio, better than 50 db, 200-12,000
cps; 45 db unweighted (including hum). Wow and flut-
ter less than 0.2% at 7 , / ^"/sec. Longterm speed stability,
better than 0.5%. Erase and Bias frequency, 53,000 cps.
Inputs: Two; 1 megohm and 0.1 megohm respectively.
Outputs: Two; 0.75 volts at 0.1 megohm for external
amplifier; 15 ohms at 2'/2 watts (undistorted). 3 motors
including hysteresis synchronous drive. "Ferrodexer"
counter, clock type with zero setting, factory installed
$20.00 additional. Master control switch for permanent
inputs and outputs. Weight: 45 lb.
Model 3S — data on this model identical with 3 A Series
above except for addition of stereo playback. Signals
from stacked stereo head may be fed into external dual
amplifiers via an equalization chain for each section or to
a "Stere-ad" unit which provides all power output for
stereo replay requiring only a suitable speaker system.
Weights: Model 3S: 49% lb. "Stere-ad" unit: 12"/ 2 lb.
Portable recorder for stereo recording and playback
manufactured by British Ferrograph Recorder Co., Ltd.
of London. Signal-to-noise ratio, better than 50 db, 200-
12,000 cps; 45 db unweighted (including hum). Wow
and flutter, less than 0.2% at 7l/2"/sec. Longterm speed
stability, better than 0.5%. Erase and bias frequency,
53,000 cps. Accommodates up to %Ya" reels.
Twin recording amplifiers and twin replay preamps
terminating at 3 milliwatts across 600 ohms (balanced).
Switched VU level meter provides proper recording levels
for each track which is served by dual inputs ( 1 megohm
and 0.1 megohm 0.003 V peak and 0.1 V peak respec-
tively). "Ferrodexer" counter, clock type with zero set-
ting, factory installed $20.00 additional. Weight: 48 lb.
Battery-operated recorder manufactured by Electrical H
Musical Industries, Ltd. of England. Accommodates 5"
reels and requires no external power source. Signal-to-
noise, better than 45 db unweighted, when replayed on
high quality studio equipment. Wow, less than 0.2% at
15"/sec, 0.25% at 7'/ 2 7sec. and 0.3% at 3%"/sec.
Separate recording and playback heads and amplifiers for
monitoring and instantaneous playback. VU meter for
recording level. Manually operated geared rewind device
to conserve battery life. Operates with cover closed.
Weight, 141/2 lb. complete.
Transistorized portable recorder with variable speed con-
trol. Operates on four type C flashlight batteries. Plays
for 16 minutes with 3" reel containing 300 feet of Ya"
magnetic tape. Erase head can be swung out of the way
so that erase is optional. Instant braking, fast rewind,
automatic slack take-up. Plays back through headset fur-
nished with recorder. Weight: 2 lbs.
10
41 DIG RECORD
October, 1958
Manufacturer
GBC
AMERICA
CORP.
243 Broadway
New York 7,
N. Y.
INTERNA-
TIONAL
RADIO AND
ELECTRONICS
CORPORATION
South 17th St.
& Mishawoka Rd.
Elkhart,
Ind.
Model and Price
GBC PT/12
Recorder
$169.50
Crown Prince
Dual Track
$395.00
With In-Line
Stereo
Playback Added
$480.00
*?*
£*£&
0!
Crown Imperial
Dual Track
$495.00
With In-Line
Stereo
Playback Added
$580.00
Crown Broadcaster
$435.00
Crown-O-Matic
$495.00
Q
Crown Royal
$845. Less Case
Frequency
Response
75-7,500
cycles at
3% "/see.
20-30,000
cycles (±2 db)
at 15 "/sec.
20-20,000
cycles (32 db)
at 7>/j"/ sec.
20-10,000
cycles (=3 db)
at 3% "'sec.
as above
as above
20-20,000
cycles (=2 db)
at 7i/j"/sec.
20-10,000
cycles ( 3 db)
at 3 3/ 4 "/sec.
Data
New dual track, dual speed Italian portable recorder.
Speeds: 3% and 1%. "Picture" push buttons for fast
rewind, playback, stop, record, fast forward. Magic eye
volume indicator. Built-in loudspeaker. Undistorted
power output: 2'/2 watts. 80 minutes maximum record-
ing time. Size in case: ">Y 2 x 10 x 11. Weight: 12 lbs.
All "Crown" series models have the following specifi-
cations: wow and flutter: .07% at 15 ips, .09% at 7}/ 2
ips, .20% at 3^4 >ps; Signal-to-noise ratio: 57 db at
15 ips, 54 db at iy 2 ips, 44 db at 3% ips; Micro-Sync-
Timing: 99.5% playing measured tape, 99.8% record-
playback, synchronous motor, 99.75% shaded pole
motor. They have: electro-magnetic brakes, "micro-
linear" heads, cathode follower out, straight line thread-
ing, fast forward and rewind, reel locks, three speeds,
white light for playback, red light for record.
Crown Prince is rack-panel mounted unit measuring 19"
x 14". Uses IOJ/2" reels. Safety record light and lock.
High impedance microphone and phono input. Case
optional. Portable. Half-track heads standard.
See "Crown" specifications above. Has 20 watt built-in
amplifier. Two microphones and one phono high impe-
dance input. 4-8-16 ohm output. Cathode follower out.
Uses lOf/2" reels. Portable.
Same as Crown Imperial except that it can use only up
to 7I/2" reels.
See "Crown" specifications above. Two-speed (7J/j ips
and 3^4 >P S ) unit for rack mounting. Has forced air
cooling. Playback preamp. Cathode follower output.
Plays sixteen hours without repeating on 14" reels at
3% ips. Playback only.
"New"
Gold Crown
Series
Gold Crown
Prince
$425.00
With Stereo
Playback Added
$475.00
□ '©©:©©
Gold Crown
Imperial
$520.00
With Stereo
Playback Added
$570.00
Gold Crown
Broadcaster
$509.00
Stereo-X
$695.00
Q *©©;©•
Q •©©»©©
Gold Crown
Royal
$865.00
20-30,000
cycles (=2 db)
at IS"/ sec
20-20,000
cycles (±2 db)
at 7'/," /sec.
20-10,000
cycles (=3 db)
at 3% "/sec.
as above
as above
as above
as above
as above
See "Crown" specifications above. The Crown Royal is
a complete stereo recorder which records full or half
track. Four microphone inputs and two 20-watt Hi-Fi
output amplifiers. Heads are in line. Takes up to lO'/^"
reels. Portable.
See "Crown" specfications above. Plug-in heads. Ano-
dized aluminum construction. Constructed for rack and
panel mounting. Modular design so units may be added
to units. Engraved panels. Records and plays half-track
monaural. Plays stereo to two cathode follower outputs.
Gold Crown Prince plus an outboard power output am-
plifier. Records and plays monaural with 20 watt output.
For broadcast station use. Records and plays full-track
with full width heads and synchronous motor.
See "Crown" specifications above. Records and plays
stereo. Plug-in two or four track heads. Four micro-
phone inputs. Two cathode follower outputs. All alumi-
num construction.
The Stereo-X, plus two-50 watt "micro-linear" output
amplifiers.
15
Manufacturer
PREMIER
ELECTRONIC
LABORATORIES
382 Lafayette St.
New York 3,
N. Y.
PRESTO
RECORDING
CORPORATION
P. O. Box 500
Paramus,
New Jersey
Model and Price
"Tapesonic"
Model 70-C
$398.75
Stereophonic
Model 70-C B.L.
$446.75
Frequency
Response
Model PB-17C
Tape Reproducing
Mechanism
$785.50
Model A-909
Pre-amplifier
$132.00
Continuous Tape Reproducing Console
$1,118.75
RADIO
CORPORATION
OF AMERICA
RCA Victor
Division
Camden 2,
N.J.
RANGERTONE
INC.
73 Winthrop St.
Newark 4,
N. J.
800 Series
Tape Recorder
with Amplifier
Monaural
Rack Mtg. $1375.00
Portable $1480.00
Console $1649.00
Stereo
Rack Mtg. $1780.00
Portable $1930.00
Console $2094.00
Transport only
$993.00
The Senator
Model 8TR2
$179.95
30-18,000
cycles ( -3 db)
at 15" sec.
30-15,000
cycles (=3 db)
at 71/2 "/sec.
30-7,500
cycles ( 3 db)
at 3 V 4 " sec.
Data
Portable professional type three-speed dual track re-
corder. Three motors, including hysteresis synchronous
drive motor. 4]/ 2 " VU meter. Push button operation
using seven relays and one solenoid. Three separate
heads, permitting instantaneous monitoring from tape
while recording. A.B. switch permits comparison between
original and recorded program. Flutter and wow 0.1%.
Mixing channels for mike, radio or phono inputs. Full
protection against accidental erase. Bass and treble con-
trols with flat response setting. Fast forward and rewind,
less than one minute for 2400 ft. Electro-dynamic brake
action and tape tension, never requires adjustment. DC.
on preamp heaters. Push-pull 16 watts audio output.
Also available with stereo in-line head playback includ-
ing dual track record and playback.
50-8,000
cycles at
3 3/4 "/sec.
A-520 Pre-amplifier
in console cabinet
30-20,000
cycles (-2 db)
at 15 sec.
40-12,000
cycles (=2 db)
at 7 1/2 "/sec.
90-8,000
cycles at
7i/ 2 " /sec.
Dual-track reproducing mechanism with 3^4" tape speed
and automatic reversal, giving up to 8 hours of continu-
ous music on a 4800-ft. reel. At end of this time, mecha-
nism may be made to recycle or stop. Heavy duty capstan
drive unit with individual torque motors for each reel.
Fast forward and fast rewind. Signal-to-noise, 55 db.
Flutter 0.35% at iy 4 " speed. Silence sensing switch and
timing accessories available.
Long-playing tape reproducing unit consisting of PB-17C
tape transport mechanism. Dynamic range, 45 db.
New professional-type tape recorder featuring sweep
loading, automatic tape lift, new type editing function
for run-off of unwanted tape, new cue button for hand
cueing without motor or brakes, and new solenoid brakes
and pressure pulley. Has a direct-drive hysteresis syn-
chronous capstan motor and two torque motors. Three
speed ranges of rewind and fast forward. Input can be
switched to balanced or unbalanced 600-ohm line, bridg-
ing input or microphone input. Illuminated VU meter.
Two separate output circuits. Wow and flutter are no
more than 0.10% at 15 ips or 0.15% at 7'/ 2 ips. Signal-
to-noise ratio is 60 db at 1.07c distortion. Distortion is
1.0% (harmonic) at ± 18 dbm output from 35 to 15,000
cps. Monaural version with either full- or half-track
heads. Add $50 to stereo prices for two channel version.
The Diplomat
Model 8TR3
$219.95
P£>
Rangerette'
Portable
Model A-2
$1500.00
complete
1 3 Y3*
p * 1
1 i ty»*
•
■
Console
Model
R-5C
with synchronizer
$4925.00
70-12,000
cycles at
7y,",sec.
45-15,000
cycles ( =2 db)
at 15", sec.
50-8,000
cycles ( 2 db)
at 7'/2"/sec.
New push-button controlled portable. Two speeds: 7]/ 2
and 3^4 'P s - Input for radio-phonograph. Neon lights for
recording level. Speaker is 5" x 7". Ceramic microphone.
Pilot light indicates when recorder is on. Power output
is 2.5 watts undistorted. Dimensions: 9% 6 " x I8V16" x
l4M4g". Rewind time for 7" reel is 2 minutes. Available
in charcoal and tan-and-brown cases.
New portable recorder. One 6]/ 2 " speaker for low and
mid-range frequencies, two V/ 2 " speakers for high fre-
quencies. Window counter indicates location of any par-
ticular recording on a recorded tape. Auxiliary speaker
jack can also be used as earphone jack. Available in gray
and green cases. Dimensions: 9 I Me" x n n Aa" x 14%".
Otherwise same as above.
FOR SYNCHRONOUS SOUND RECORDING
Professional-type, single-track, dual -speed recorders,
with choice of 3%", 1\/ 2 ", 15" or 30" per second tape
speeds. Up to 2 hours recording at 7Y 2 " per sec. on 14"
reel. Distortion, less than 2% total harmonic. Maximum
signal-to-tape noise, 55 db. Double-puck, tight-loop tape
drive. Peak-to-peak flutter, less than 0.1% at 15"/sec.
Rewind speed controllable continuously from to 250/
sec. in both forward and rewind. Meets all N.A.B.
adopted standards. Complete monitoring and mixing
facilities. VU meter, signal indicator and footage counter
calibrated in minutes and seconds. Complete tape editing
facilities. Also available with positive "sprocketless"
synchronization for motion picture and TV applications.
Weight of Rangerette — 30 lb.
Kits added to other professional recorders for Syn-
chronous Sound Recording for $320.00.
14
AIMO RECORD
October, 1958
11
Manufacturer
THE
PENTRON
CORPORATION
777 South Tripp
Avenue
Chicago 24, III.
Model and Price
Mercury
Model NL-1
$159.95
Model NL-1S
Stereo
$199.95
Champion
Model NL-2
$219.95
Model NL-2S
Stereo
$259.95
Aristocrat
Model NL-3
$269.95
Model NL-3S
Stereo
$309.95
Emperor II
Stereo System
Model NL-4
Stereo Recorder
$450.00
Model ES-2
Speaker System
$75.00
PHILCO
CORPORATION
Philadelphia 34,
Pennsylvania
Tape Mechanisms
TM-1 Monaural
$84.50
TM-4
Stereo /Monaural
$109.95
Frequency
Response
40-1 1,000 cycles
at 7'/," sec.
40-7,000 cycles
at 3 % " sec.
Data
Manufacturer
Two-speed portable recorder. Features "Finger-Flite"
single rotary control for Play, Record, Fast Forward, Fast
Rewind. Removable head pole piece allows quick change
from half to full track. Interlock record button prevents
accidental recording or erasure. Has 6" speaker built in.
Signal-to-noise ratio is 45 db. Fast Forward winds 7" reel
in 75 seconds. Wow and flutter is under 0.4% at 7'/2 ips.
Four-pole motor. Inputs: 1 microphone, 1 radio. Out-
puts: 1 amplifier, 1 speaker. Weight: 25 lbs.
40-13,000 cycles
at 7'/j"/see.
40-7,000 cycles
at 3 3 / t sec.
40-15,000 cycles
at 7'/j"/sec.
40-7,500 cycles
at 3 % " sec.
40- 1 5,000 cycles
at 7'/i"/sec.
40-10,000 cycles
at 3% "sec.
40-14,000 cycles
at 7'/j" sec.
Dynacord
Tape Recorder
Mechanism only
Full or half track
$645.00
Stereo $845.00
Pre-amp
Studio standard
$130.00
Broadcast standard
$200.00
LP Magazine R
Repeater
Model A-l $99.95
Model A-2 $87.95
Model A-3 $79.95
Model A-4 $119.95
Model ST 300
Stereo Recorder
$229.95
40-15,000
cycles ( ±2 db)
at 15 "/sec.
40-10,000
cycles ( =2 db)
at 7 '/ 2 " / sec.
40-7,000 cycles
at 33/ 4 sec.
40-15,000
cycles at
7'/, "/sec.
Two speed portable recorder. Has "Finger-Flite" single
rotary control for Play, Record, Fast Forward, Fast Re-
wind. Features a dual extended range speaker system with
crossover network: one 6" round PM woofer, 1 exponen-
tial 4" tweeter with solid basket. Head has removable
pole piece. Amplifier output is 5 watts. Digital index
counter. Automatic braking; magic eye record level indi-
cator. Signal-to-noise ratio is 48 db. Wow and flutter is
under 0.4% at lYl ips. Inputs: 1 microphone, 1 radio.
Outputs: 1 amplifier, 1 speaker. Weight: 29 lbs.
Dual speed portable tape recorder. "Finger-Flite" single
rotary control for Play, Record, Fast Forward, Fast Re-
wind. Contains two 6" round PM woofers; one 6" round
mid-range; one exponential tweeter with solid basket.
Double LC crossover networks with cutoffs at 600 cycles
and 2000 cycles. Has 10 watt push-pull amplifier and
illuminated VU meter. Signal-to-noise ratio is 50 db.
Wow and flutter is under 0.4% at lYl ips Head has
removable pole piece. Automatic shut-off switch at end
of reel. Two high impedance inputs: one high and one
low impedance output. Weight: 3 5 lbs.
New home stereo system that can record and play back
2- and 4-channel stereo, and monaural. Speeds: l]/l ar >d
3J4 >P S - "Finger Flite" single rotary control. Safety inter-
lock record button. Dual pole erase head. Two 4" x 6"
oval speakers. (ES-2 speaker system contains six more.)
Power output : 20 watts push-pull. Two electron recording
beam level indicators. Signal-to-noise ratio: 50 db. Wow
and flutter: under 0.3% at 1Yl 'P s - Index counter. Auto-
matic shutoff. Inputs: one for microphone, one for radio/
phono. (Each jack has two input positions.) Outputs:
two for external amplifiers, two for external speakers.
Dimensions: 17" x 17" x 11". Weight: 45 lbs.
New line of tape mechanisms. Single rotary control for
Drive, Fast Forward, Fast Rewind. Two speeds: IY2 an d
"iY"> >P S - Signal-to-noise ratio is 5 5 db. Flutter is under
0.4% at 7'/2 ip s - Head pole pieces are removable. Four
standard pin jack outputs. Two AC convenience outlets.
TM-1 is for monaural recording and playback only. TM-4
is for stacked and staggered stereo recording and play-
back plus monaural recording and playback.
New professional tape recorder available in full or half
track monaural version or stereo version. Two speeds:
15 and lYl >P S - Electrical push button operation. Record
interlock. Dynamic braking, automatic shutoff. Auto-
matic monitoring of output simultaneous with recording.
Three motors. Hysteresis synchronous capstan motor.
Separate constant torque wind and rewind motors. Wow
under 0.15% at 15 ips, 0.25% at V/2 ips. Signal-to-
noise ratio: over 5 5 db. Maximum distortion not exceed-
ing 3%. Add $50 for mechanism case, $40 for studio
standard preamp, $35 for broadcast standard preamp.
New series of magazine repeaters playing a regular loop
for 28 minutes, Moebius loop for 55 minutes. Stopping
by voice operated relay activated by silence on tape
between messages. When applicable, signal-to-noise ratio
is 45 db, flutter is 0.5%. A-l is complete with amplifier,
speaker, triggering circuit, case, handle. A-2 is same
without triggering circuit. A-3 includes pre-amp, case,
handle. A-4 is recorder/playback, speaker, recorder in-
dicator, microphone, case, handle, magazine.
New dual track, dual speed recorder for monaural rec-
ord/playback and stereo playback. Speeds: 7'/2 and 3^4
ips. Push-button controls. Safety switch prevents acci-
dental erase. Pause control. Automatic shutoff. Index
timer. Two internal speakers. Tuning eye recording indi-
cator. Wow and flutter less than 0.5%. Inputs: one for
microphone, one for radio/phono. Outputs: one for
external speaker, one for stereo speaker. Dimensions:
9I/2" x 15" x 14". Weight: 39 lbs.
JAMES
INSTRUMENT
LABORATORY
9110 South
52nd Court,
Oak Lawn,
III.
KIMBERLY
INDUSTRIES,
LTD.
1081 Lexington
Avenue
New York 21, N. Y
KINGDOM
PRODUCTS
LTD.
514 Broadway
New York 12, N. Y
MAGNECORD,
INC.
P.O. Box 7186
Tulsa, Okla.
Model and Price
Audikon
Model V-12
amplifier and
mechanism for
rack or console
mounting
$595.00
Carrying
Cases
$60.00
Phono-Trix
Recorder
$99.95
Model 100 Series
Stereo Recorders
WITH FORMICA
CASE
Mechanical Unit and
Pre-amp only $469.95
Speaker Amplifier
S159.95
WITH PORTABLE
CASE
Mechanical Unit and
Pre-amp only $449.95
Speaker Amplifier
only $129.95
WITHOUT CASE
Mechanical Unit
only $255.00
Pre-amp only $165.00
Mechanical Unit and
Pre-amp only $419.95
Model 728 (Price upon request)
Model N35-B
Four Pole Motor
$299.95
Model NS35-B
Hysteresis
Synchronous
Motor
$349.95
Magnecord S36-B
Recorder and Preamp. with Case
Without Case
$415.00
$385.00
Frequency
Response
20-20,000
cycles (±3 db)
at 15"/ sec.
30-15,000
cycles (±3 db)
at 7'/, "/sec.
Suitable
for voice
recording
50-10,000
cycles (±3 db)
at 7'/, "/sec.
40-15,000
cycles at
7 V, "/sec.
50-7,500
cycles at
3% "/sec.
30- 1 8,000
cycles (±2 db)
at 15"/ sec.
40-15,000
cycles (±2 db)
at 7'/j"/sec.
50-10,000
cycles (±2 db)
at 3 3 / 4 "/sec.
Extended range
to 12,000 cycles
50-15,000
cycles (±2 db)
at 15" /sec.
50-10,000
cycles (±2 db)
at 7y 2 "/sec.
Data
Two speed, dual track recorder with three-motor drive
and electric push-button control via interlocked relays.
Hysteresis synchronous direct-drive capstan. Separate
record and playback heads permit monitoring from tape
while recording. Head assembly has anti-dropout design
and automatic tape lifter. Mixing inputs for 250-ohm
balanced mike and 500,000 ohm unbalanced line. Cath-
ode follower output, plus push-pull 8 watt monitor with
independent loudness control : monitors at any level with-
out affecting recording level. In-line stereo playback
head with dual channel playback pre-amp circuitry al-
lows stereo playback with any power amplifier to serve
as second channel. Wow and flutter below 0.2% at 1]/l
ips. Signal-to-noise ratio: 48 db at lYl ip s » ^4 db at
15 ips. Overall distortion is 1%. Rewind time: 1200 ft.
in 40 sec. Mechanism weight: 38 lbs., amplifier: 11 lbs.
Variable speed transistorized West German portable tape
recorder that operates on four flashlight batteries for 50
recording hours. Speeds variable from 1 to 8 ips. Record-
ing time is 30 minutes on each track of 3" reel of tape
at 1 ips. Playback through microphone or speaker. Fast
rewind. Color-coded slide button operation. Dimensions:
6'/2 x 4J4 x 31/2. Weight: 5 lbs. in case.
Dual speed, dual track portable tape recorder that oper-
ates on batteries. Speeds: lYl and V/& ip s - Uses iYz"
reels that will record 36 minutes per track at V/i ip s -
Can be operated closed. Fast rewind. Recording level
indicator; battery and motor indicator. Inputs: micro-
phone and radio/phono. Output for external speaker.
Wow and flutter: 0.4%. Noise level: 35 db. Dimensions:
9H x 5 x iy 6 . Weight: 4'/ 2 lbs.
New series of tape recorders for both stereo and mon-
aural recording and playback. Two speeds: 7 Yl and 3^4
ips. Separate channel balance controls. Master level con-
trol. Individual VU meters for each channel. Four inputs:
two microphone-high impedance unbalanced; two high
level auxiliary for tuner, phono, tape. Outputs: two cath-
ode follower, unbalanced. Binaural monitor phone jack.
Recording indicator. Wow and flutter: less than 0.3%.
Signal-to-noise ratio: more than 48 db. Distortion: 1%
at 10-watt output. Formica cases available in walnut,
blond and teak finishes. Add $5 5 for synchronous motor
available for all models except the mechanical unit and
pre-amp in portable case.
New professional design portable for either stereo or
monaural recording. Speeds: either 15 and 1Yl 'P s or
lYl and 3^4 ips. Hysteresis synchronous motor. Elec-
trical pay-off and take-up torques. Push-button controls.
Tape position indicator. Can be supplied with full track,
half track or stereo heads. Two VU meters. Separate
record and playback amplifiers. Individual controls for
record gain and master gain. Timing accuracy: ±3 sec-
onds in 30 minutes. Signal-to-noise ratio: better than 50
db per channel. Wow and flutter: 0.1% at 15 ips,
0.15% at 7J/2 ips. Output: cathode follower. Input: two
high impedance and two unbalanced bridges, two low
impedance with plug-in transformer. Panel size: \1Yl
x 13 x 10". Weight: 40 lbs.
Recorder and 8-watt power amplifier in composite carry-
ing case. Tape speeds lYz and 3 J4 ips by capstan change.
Phone jack on front panel for monitoring. High im-
pedance microphone furnished. High and low impedance
outputs for feeding external system. Printed circuit rec-
ord amplifier. Interlock prevents accidental tape erasure.
6" x 9" speaker. Illuminated VU meter. Panel size 8Y2" x
15". Weight: 40 lbs. Half-track heads standard.
Single unit recorder and preamplifier for rack or port-
able mounting. Two-speed, single-track, with capstan
speed change and hysteresis synchronous motor drive.
Signal-to-noise, 50 db unweighted. Flutter, 0.3%. Re-
wind time, 40 sec. for 1200 ft. Erase and record /play-
back heads. VU meter for record and playback level.
Phone jack for monitoring. Microphone and unbalanced
bridging inputs. 600 ohm balanced or unbalanced line
output. Weight: 40 lbs. in case.
12
4LDIO RECORD
October, 1958
13
Manufacturer
Model and Price
Magnecord PT6-6A
Monaural Recorder
Without Case
Recorder $375
Amplifier $265
Add $30 for case
Magnecord PT6BA2HZ Stereo Recorder
Without Case
Recorder $450 Amplifier $495
Add $45 for case
Magnecord
P75
Tape Transport
with case $575
without case $535
Amplifier
with case $305
without case $265
Frequency
Response
50-15,000
cycles (±2 db)
at 15"/ sec.
50-7,500
cycles (±2 db)
at 7 1/,"/ sec.
Data
Portable, two-speed, single-track recorder with speed-
change switch and hysteresis synchronous drive motor.
Signal-to-noise, 50 db. unweighted. Flutter: 0.3% at
15"/sec, 0.4% at 7l/ 2 "/sec. Rewind time, 40 sec. for
1200 ft. with automatic tape lift. Erase and record/play-
back heads. VU meter for bias, record and playback
level. Monitoring by 5" speaker and phone jack from
tape or input. 10 watt power amplifier. Microphone and
unbalanced bridging inputs. 4 and 16 ohm power out-
puts, 600 ohm line output.
MAGNECORD,
INC.
P. O. Box 7186
Tulsa, Okla.
(Other models
available)
Magnecord Stereophonic P75
Tape Transport Tape Transport with
with case $695 Matched Amplifiers
without case $655 without case $1,185
Magnecord
P73
Tape Transport
with case $575
without case $535
Amplifier
with case $390
without case $345
»1V vny
MAGNETIC
RECORDING
INDUSTRIES
126 Fifth Avenue
New York 11,
N. Y.
Magnecord
M90
Tape Transport
with case $995
without case $935
Amplifier
with case $390
without case $360
Recorder /Amp.
with case $1375
without case $1285
Recorder/Amp. and Console Cabinet, $1450
40-15,000
cycles (±2 db)
at 15" /sec.
40-12,000
cycles (±2 db)
at 7'/j"/sec.
50-15,000
cycles ( 1 db)
at 15 sec.
50-10,000
cycles (±2db)
at 7'/, "/sec.
Binaural recording version of above. Same specifications
except for three speeds (15, iy 2 , 3% ips) with capstan
change, 48 db signal-to-noise ratio, and interchannel
calibration circuit.
Rack-mounted or portable full-track recorder with IOJ/2"
reel capacity. Direct drive hysteresis synchronous motor.
Push-button controls, instantaneous start and stop, fail-
safe brakes and tape break control. Signal-to-noise, 55
db unweighted. Flutter; 0.2% at 15"/sec, 0.25% at
7 /4"/sec. Rewind time, 100 sec. for 2400 ft. Timing
accuracy, ± 3 sec. in 30 min. Separate erase, record and
playback heads. VU meter for bias, record and playback
level. Adjustable bias and high-speed cueing control.
Microphone and unbalanced bridging inputs. Phone jack
for monitoring from tape or input. 600 ohm unbalanced
line output. For recorders with 50-cycle operation,
add $75.
Tape transport mechanism similar to above, but designed
for use with P73-J amplifier instead of P75-C, permitting
conversion of existing equipment to new, improved per-
formance standards. Signal-to-noise, 50 db unweighted
Microphone input, 50 to 250 ohms balanced or unbal-
anced. Unbalanced bridge input. Monitoring by 5"
speaker and phone jack from tape or input. Amplifier,
600 ohm balanced line output, 4 or 16 ohm, 10 watt
speaker output. For recorders with 50-cycle operation,
add $75.
30-15,000
cycles (±2 db)
at 15" /sec.
30-15,000
cycles ( ±4 db)
at 7V 2 "/sec.
Magnecord Stereophonic M90
Record /Amplifiers Tape Transport
with case $2165 with case $1455
without case $2035 without case $1385
Magnecord
817DLX
Long Term
Record Unit
$1,814
Model MDA
Tape Player/
Amplifier
$295.00
50-10,000
cycles at
7 V, "/sec.
50-5,000
cycles at
3 % "/sec.
to 8,500
cycles at
7i/j"/sec.
Portable, professional-type two speed recorder/amplifier
units, also available in console cabinet mounting. Elec-
trically interlocked push-button controls. Direct-drive
hysteresis synchronous motor. Separate erase, record and
playback heads — interchangeable assemblies for full
track, half-track or instrumentation. Instantaneous start
and stop, automatic tape lift. Separate record and play-
back amplifiers for simultaneous monitoring from tape.
High speed cueing control. Signal-to-noise, 58 db un-
weighted. Flutter: 0.1% at 15"/sec, 0.15% at V/>" I sec.
Rewind time, 55 sec. for 2400 ft. VU meter for bias,
record and playback level. 50 or 250 ohm balanced or
unbalanced microphone input, balanced or unbalanced
bridge input. Line output, 600 ohms balanced or
unbalanced.
A long term storage recorder that is completely auto-
matic in operation. This single channel, two-speed, rec-
ord/playback machine is designed to operate continu-
ously for at least 8 hours ( 14" reels — 4800 feet of tape).
To avoid any loss of recording information, the erase
head has been eliminated. Will record and playback one
track in the left -to-right direction, automatically reverse,
record and replay the second track in the other direction.
It will start and stop on voice signals.
Master distribution amplifier complete with tape drive
mechanism. Less than Vi% total harmonic distortion at
8 watts. Total power output 10 watts. Complete with
master meter system measuring proper output signal
being fed into student positions. Sufficient capacity to
handle up to 200 student positions. Separate bass and
treble controls. Three position selector switch permitting
instant flipover from tape to living voice (microphone)
or to external source (phonograph, shortwave radio,
etc). Complete with 14"xl8" master panel.
Manufacturer
MAGNETIC
RECORDING
INDUSTRIES
126 Fifth Avenue
New York 11,
N. Y.
ROBERT C.
MERCHANT
2701 Oxford St.
Lafayette, Indiana
Model and Price
Synchrotone
Dual Language
Recorder
Model 68-DL
$375.00
Model 68
$337.00
Model 65B, $250.00
Synchro-Magneticon Dual Tape-Disc
Recorder-Reproducer Model ML-66, $275
(in portable case, $295)
Frequency
Response
to 8,500
cycles at
7i/j"/sec.
METZNER
ENGINEERING
CORP.
1041 N. Sycamore
Avenue
Hollywood 38,
California
Custom Language Teaching Equipment
(Prices on request)
Starlight "120"
Stereo Tape Deck
$179.50
MOHAWK
BUSINESS
MACHINES
CORP.
944 Halsey Street
Brooklyn 33, N. Y.
to 8,000 (tape)
to 5,000 (disc)
Data
Dual recorder-reproducer permitting simultaneous re-
cording on two channels, or simultaneous playback of
"master" channel and simultaneous recording on "stu-
dent" channel; or simultaneous playback of "master" as
well as "student" channel. Speeds: 3% and 7J/2 ips.
Two record-play safety lights. Concealed selector switch
for recording on "master" channel (makes student era-
sure of "master" impossible). Inputs: external line and
microphone. Two outputs for headphones. Single volume
control for both channels. Shut-off switch for external
line. Single knob control; beltless drive. Automatic safety
switch prevents accidental erasure during rewind; auto-
matic shut-off switch; footage index counter.
Model 68 is identical to Model 68DL except for auto-
matic shut-off switch and footage counter. Model 65B
is similar to Model 68 except for belted drive mechanism.
Educational language recorder using standard tape and
pre-grooved, reusable magnetic discs. Instant stop-start
without slurring. Remote control of magnetic disc. Tape
speeds iy 4 " or 754". Weight: 22 lbs.
50-13,000
cycles (±2 db)
at 7 1/2 "/sec.
40-15,000
cycles ( ±2 db)
at 7'/j"/see.
Mohawk
"Midgetape" 300
All Transistorized
1 Battery Operated
Pocket Tape
Recorder
$249.50
NORTH
AMERICAN
PHILIPS
CO., INC.
230 Duffy Ave.
Hicksville, N. Y.
Mohawk
Message Repeater
Record-Playback
Unit $159.50
Playback Unit $99.50
■"> \
Norelco
"Continental"
Portable
Recorder
Model EL 3516
$269.50
New Model MC series multi-channel language laboratory
recording equipment featuring Mark IV console. Can
handle up to 40 students and two teachers. Has cast-
aluminum transport with full solenoid controls on all
functions. "Piano Key" controls. Automatic shut-off.
Automatic selection locator. Start, stop, and rewind by
remote control. Signal-to-noise over 45 db. Flutter below
0.2%, Wow below 0.05%. Amplifier designed for lan-
guage laboratory with preset input and output levels of
1.228 volts for VU meters. Compensated for crystal
microphones and earphones as furnished with recorder.
Electronic eye recording level indicator. Earphone vol-
ume adjustable by student from 60 db to 80 db level.
Other series and models available including full transistor
versions with automatic volume control.
New tape transport mechanism that records and plays
stereo. Two speeds: 1]/ 2 and iy 4 ips. Hysteresis syn-
chronous motor. Flywheel loaded capstan drive. Index
counter. Shielded head. Interlocked controls. Wow and
flutter under 0.18% at 71/2 ips. Stereo head inductance
400 mhy. for high output voltage. Timing accuracy bet-
ter than 0.2%. Signal-to-noise ratio: 55 db. Fast forward
at 1 1.77sec. Connections to heads at sub-mounted phono-
type jacks.
150-5,500
cycles at
1 7 / 8 "/sec.
200-5,500
cycles (±iy 2 db)
at 3 % "/sec.
40-16,000 cycles
at 7yj"/sec.
50-8,000 cycles
at 3 V 4 "/sec.
60-4,500 cycles
at 1 % "/sec.
Portable recorder. Instantly records and plays right back.
No electricity required. Battery life 12 to 50 hrs. 4 tran-
sistors. Optional internal transistorized loudspeaker. 1 or
V/2 hr. cartridge-loaded tape. 3 controls: On-Off, Play-
Record and Volume. Wow and flutter, less than 0.7%.
Signal-to-noise ratio, 42 db. Input, 2,000 ohms-one mv
min. Output, 10 milliwatts at 2,000 ohms. Tape used:
!4" "Mylar" base, twin track. Supplied with battery,
comb, microphone/speaker and 1 hr. tape. Accessories
available. Size: 8l/ 2 " x 3%" x 17/g". Weight: 3 lbs.
Midget, recorder/playback unit with continuous-loop
tape cartridges of from 15 to 240 seconds capacity. Re-
peats message continuously or intermittently by external
switch control. No rewinding necessary. Neon bulb
recording level indicator. Built-in 5" speaker. Output,
1.2 watts. Plug-in sockets for microphone, external start,
external amplifier or speaker. Overall size, 6'/ 7 " x ">V A " x
5^2". Weight: 5% lb.
Amplifier /Speaker
$95.00
Norelco
"Continental"
Portable
Stereo Recorder
Model EL3516G/73
$299.50
40-16,000 cycles
at 7i/j"/sec.
50-10,000 cycles
at 3 % "/sec.
60-5,000 cycles
at iy 8 "/sec.
Three-speed, dual track, push-button controlled portable
recorder. Has "magic eye" volume indicator, piano-key
controls. Head has air gap of only 0.0002". Contains 5"
twin-cone speaker. Signal-to-noise ratio is 54 db. Wow
and flutter is 0.2% at 7l/ 2 ips, 0.3% at 3% ips, 0.35%
at l^g ips. Fast forward and reverse: less than 2 minutes
for 1200 feet. Automatic stop at end of reel with metal -
ized tape. Inputs: one radio/phono, one microphone.
Outputs: one external speaker, one external amplifier.
Dimensions: 16" x 13" x 8". Weight: 30 lbs.
Stereo version of above. Same specifications as above
except for following. Wow and flutter is 0.15% at 7'/2
ips, 0.2% at 3% ips, 0.35% at 1% ips. Five outputs:
three for external amplifiers, one for external speaker,
one for monitor. Second amplifier and speaker are in a
matching cabinet.
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