FOR FINE SOUND ALL AROUND
Bob Fine, of
has
standardized on audiotape aucUocllSCS audiofilm
. . . because "No other sound recording
media have been found to meet our exact-
ing requirements for consistent, uniform
quality."
In professional circles Bob Fine is a name to reckon
with. His studio, one of the country's largest and
best equipped, cuts the masters for over half the
records released each year by independent record
manufacturers. Movies distributed throughout the
world, filmed TV broadcasts, transcribed radio
broadcasts, and advertising transcriptions are re-
corded here at Fine Sound, Inc., on Audio products.
Every inch of tape used here is Audiotape. Every
disc cut is an Audiodisc. And now, Fine Sound is
standardizing on Audiofilm. That's proof of the
consistent, uniform quality of all Audio products:
these Fine Sound craftsmen use them exclusively.
Cl ll Ctl O tCi p g 'lhe fines! magnetic
recording tape you can buy — known the
world over for its outstanding performance
and fidelity of reproduction. Now avail-
able on '/j-mil, 1 -mil and lyi-mil polyester
film base, as well as standard plastic base.
exceed the most
exacting requirements for highest quality
professional recordings. Available in sizes
and types for every disc recording applica-
audiofilm'
magnetically coated
on standard motion picture film base,
provides highest quality synchronized re-
cordings for motion picture and TV sound
tracks.
To get the most out of your sound recordings, now
and as long as you keep them, be sure to put them
on Audiotape, Audiodiscs or Audiofilm. They
SPEAK FOR THEMSELVES. » Trade Mark
AUDIO DEVICES, Inc.
444 MADISON AVE., NEW YORK 22, N. Y
IN HOLLYWOOD: 1 006 N. Fairfax Ave. IN CHICAGO: 6571 N. Olmsted Ave.
Export Dept.: 13 East 40th St., New York 16, N. Y, Cables "ARLAB"
in
record
Published by
AUDIO DEVICES, INC.
444 MADISON AVENUE, N. Y. 22, N. Y.
cuicuovlixcs
audiofilm
audiopoints
V"\i!£
1955-1956 TAPE RECORDER DIRECTORY
AUDIO RECORD
Sept.-Oct., 1955
19
QUICK FACTS ON MAGNETIC TAPE RECORDERS
(Additional Information can be obtained by writing to the manufacturer)
Manufacturer
Model and Price
Model 612
Stereophonic
Tape
Phonograph
$395.00
Model 610
Monaural Unit
$359.50
AMPEX
ELECTRIC
CORPORATION
934 Charter St.
Redwood City,
California
AMPLIFIER
CORPORATION
OF AMERICA
398 Broadway
New York 13,
N. Y.
Model 620 Amplifier-Speaker
in matching cabinet $169.50
Model 600
Portable
Tape Recorder
$545.00
Model 300-C
Console
Tape Recorder
$2046.00
Model 350-C
Console
Tape Recorder
$1315.00
Model 350 Stereophonic Recorders
350-2P, Two-Channel - $1,953.00
350-3P, Three-Channel - $2,514.00
Model 352-C
Tape
Reproducer
$935.00
Other Equipment:
Model
610-A
Tape Speed
,5 /l6 i.p.J.
Long-Playing "Magnemite" $275
Frequency
Response
40-15,000
cycles (±2 db)
at 7 Vi "/sec.
(on playback
of Ampex
standard type)
40-15,000
cycles (±4 db)
at 7 Vi "/sec.
(±2 db 40 to
10,000 cycles)
30-15,000
cycles (±2 db)
at 15"/sec.
40-15,000
cycles (±4 db)
at7V2"/sec.
(±2 db 40 to
10,000 cycles)
30-15,000
cycles (±2 db)
at 15"/ sec.
30-15,000
cycles (±4 db)
at 7 Vi "/sec.
50-7,500
cycles (±2 db)
at 3% "/sec.
(same as for
Model 300C
above)
30-15,000
cycles (±2 db)
at 15"/sec.
30-15,000
cycles (±4 db)
at 7 Vi "/sec.
(±2db40 to
10,000 cycles)
300-2500
cycles
Data
Tape playback unit only, for fine reproduction of single
track, dual track, or sterophonic (in-line head) pre-
recorded tapes at TYi"/sec. Max. reel size, 7". Flutter
and wow, below 0.25%. Two separate amplifiers, one
for each track, are used on Model 612.
Prices cover "brunette" furniture cabinet. "Blonde" furni-
ture cabinet, $10.00 additional.
Amplifier speaker in Contemporary style hand-rubbed
"brunette" furniture. "Blonde" furniture, $10.00 addi-
tional. Use two 620s with 612 tape phonograph for
stereophonic sound system.
Portable, professional-type single-track recorder with lYz"
tape speed. Takes up to 7" reels for 30 minutes recording
time. Signal-to-noise, over 55 db. Flutter and wow, below
0.25%. Starting and stopping time, less than 1 second.
Fast forward and rewind, 90 seconds for 7" reel. Timing
accuracy ± 0.2% for 30 minute recording. Separate
record and playback amplifiers. Separate erase, record and
playback heads. VU meter, independent level controls for
microphone and line, phone jack for monitoring input
or tape while recording. Weight, 28 lb.
Professional-type, single-track, dual-speed recorder oper-
ating at 15" and lYz" per sec. 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 oper-
ated. Separate long-life, plug-in heads for erase, record
and playback. Other features as on Model 3 50C below.
Also available for portable or rack mounting.
Professional-type single or dual-track recorder with tape
speeds of 7'/ 2 " and 15" or 3%" and 7'/ 2 ". 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%. 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.
Separate recording and playback amplifiers for each chan-
nel in multi-channel record and playback heads. Indi-
vidual meter and control panels for each channel. Re-
corder unit same as Model 3 50 machine.
Console-type reproducing unit for playback of 7'/2 and
15 ips, full-track or dual-track tapes. Provides up to 2
hours, 8 min. playing time on lO'/i" reel. Signal-to-noise,
over 60 db. Flutter and wow, under 0.2% at 15"/sec.
Timing accuracy within ± 3.6 seconds for half-hour pro-
gram. Instant starting and stopping. Rewind time, one
min. for 2400-ft. reel. Push button control, tape-speed
equalization and reel-size tension adjustment. No erase
or record heads — hence no danger of accidental erasure.
Model 450-C Continuous Tape Reproducer and Model
S-3200 Tape Duplicating Systems. Information on request.
Completely self-contained, battery-operated portable with
spring motor drive. Flutter, ± 0.25% over full 30-min.
winding cycle. Dual-track recording provides total of
4 hours playing time on 5" reel. Indicator light signals
30 seconds before motor rewind. Playback through head-
phones or external amplifier. Incoming signal can be moni-
tored while recording. Overall dimensions, 11" by 8" by
5". Weight, 12 lb.
COLORED AUDIOTAPE (on colored plastic base)
Green and blue colored Audiotape, in con*
junction with the standard red-brown tape,
provide instant visual identification of re-
corded selections spliced into a single reel
(as shown above) — permit fast and easy color
cueing and color coding. Eliminate need for
identifying leaders between selections.
Color
Length
Reel
Type No.
List Price
Each
Green
150 ft.
300 ft.
600 ft.
1200 ft.
2500 ft. j
5000 ft. j
3" Plastic
4" Plastic
5" Plastic
7" Plastic
NARTB Hub
NARTB lOVi" Aluminum Reel
NARTB Hub
NARTB 14" Aluminum Reel
3" Plastic
4" Plastic
5" Plastic
7" Plastic
NARTB Hub
NARTB lOVi" Aluminum Reel
NARTB Hub
NARTB 14" Aluminum Reel
151 G
351 G
651 G
1251 G
2551 HG
2551 RG
5051 HG
5051 RG
$ 0.85
1.60
3.50
5.50
10.00
12.85
20.00
26.00
Blue
150 ft.
300 ft.
600 ft.
1200 ft.
2500 ft. j
5000 ft. j
151 B
351 B
651 B
1251 B
2551 HB
2551 RB
5051 HB
5051 RB
$ 0.85
1.60
3.50
5.50
10.00
12.85
20.00
26.00
COLORED AUDIOTAPE REELS (empty reels in individual boxes)
These plastic Audiotape reels, in attractive
jewel-tone colors, provide many opportunities
for color coding recorded material — as to
tape speed, single or dual track, subject
matter, etc.
Reel
TYPE NO.
List Price
Each
Red
Yellow
Green
Blue
5" Empty Plastic Reel
7" Empty Plastic Reel
5PBR
7PBR
5PBY
7PBY
5PBG
7 PBG
5PBB
7PBB
$0.55
0.85
EMPTY AUDIOTAPE REELS (clear plastic and aluminum)
Standard tape reels in sturdy individual boxes
for convenient handling and storage. Box for
10V and 14" reels has special folding inner
sleeve of strong corrugated board for added
safety in handling and storage.
Reel
Type No.
List Price Each
3" Clear Plastic Reel, in Box
3 PB
$ 0.25
4" Clear Plastic Reel, in Box
4 PB
0.40
5" Clear Plastic Reel, in Box
5 PB
0.55
7" Clear Plastic Reel, in Box
7PB
0.85
IOV2" NARTB Aluminum Reel, in Box
10 RB
4.50
Pair of IOV2" Aluminum Side Flanges, with Screws
10S
3.35
14" NARTB Aluminum Reel, in Box
14 RB
8.70
Pair of 14" Aluminum Side Flanges, with Screws
14 S
7.25
NARTB Aluminum Hub (Without Box)
10 H
0.65
CORRUGATED MAILING BOXES (strong, re-usable containers)
Ideal for tape "correspondence groups" or
wherever frequent mailing of recorded mate-
rial is required.
Size
Type No.
List Price Each
For 5" Reels
For 7" Reels
For 10J4" Reels
5M
7M
10M
$ 0.15
0.20
0.30
18
AVDIO RECORD
THE COMPLETE
CtttfllOtftPjg
LINE
PLASTIC BASE AUDIOTAPE
The finest, professional-quality tape ob-
tainable — especially formulated to pro-
vide the balanced performance which is
essential to the most faithful reproduction
of the original live sound throughout the
entire audible frequency range. Assures
maximum fidelity, uniformity, frequency
response and freedom from noise and
distortion.
Length
Reel Type No. t
List Price Each
150 ft.
300 ft.
600 ft.
3" Plastic
4" Plastic
5" Plastic
151
351
651
$ 0.85
1.60
3.50
1200 ft.
7" Plastic
1251
5.50
2500 ft.
NARTB Hub
NARTB 10W Aluminum Reel
2551 H
2551 R
10.00
12.85
5000 ft.
NARTB Hub
NARTB 14" Aluminum Reel
5051 H
5051 R
20.00
26.00
TYPE
longer
R
ecording
AUDIOTAPE on 1 mil "Mylar'
Provides 50% more recording time on a
single reel of tape. Same super-quality
magnetic oxides as Plastic Base Audio-
tape, but uses base material of 1 mil
"Mylar" polyester film having much higher
tensile and tear strength than cellulose
acetate of the same thickness.
Length Reel
Type No. $
List Price Each
225 ft.
900 ft.
1800 ft.
3600 ft. j
3" Plastic, in Self-Mailer Box
5" Plastic
7" Plastic
NARTB Hub
NARTB 10%" Aluminum Reel
261
961
1861
3661 H
3661 R
$ 1.10
4.40
7.95
16.00
17.95
AUDIOTAPE ON
Mylar
*
POLYESTER FILM
1 DuPont Trade Mark
High-strenglh, super-durable magnetic re-
cording tape that meets the highest pro-
fessional standards of performance. Made
on polyester film, if withstands extreme
temperatures, is virtually immune to hu-
midity, and gives maximum tape life under
any conditions of use or storage. Avail-
able in three base thicknesses to meet
individual recording requirement for vari-
ous applications.
Thickness
of Base
Length
Reel
Type No. \
List Price
Each
1 Mil
300 ft.
600 ft.
1200 ft.
2500 ft. j
4" Plastic
5" Plastic
7" Plastic
NARTB Hub
NARTB lOV'j" Reel
361
661
1261
2561 H
2561 R
$ 2.20
4.25
6.85
12.50
15.35
l</2 Mil
(standard)
300 ft.
600 ft.
1200 ft.
2500 ft. j
4" Plastic
5" Plastic
7" Plastic
NARTB Hub
NARTB lO'/i" Reel
371
671
1271
2571 H
2571 R
2.75
5.00
8.25
15.00
17.85
2 Mil
500 ft.
1000 ft.
2000 ft. j
5" Plastic
7" Plastic
NARTB Hub
NARTB 10%" Reel
581
1081
2081 H
2081 R
5.00
8.25
15.00
17.85
(Type Numbers listed cover red oxide tape wound on reel with OXIDE FACING IN. Tape wound with Oxide Out con
be supplied if desired, and is identified by the same Type Number except that the last digit is changed from "1" to "0".
Sept.-Oct„ 1955
Manufacturer
AMPLIFIER
CORPORATION
OF AMERICA
398 Broadway
New York 13,
N. Y.
(other models
available)
AMPRO
CORPORATION
2835 North
Western Ave.
Chicago 18,
III.
Model and Price
Model
J&z
610-B
610-C
610-TD
610-SD
610-E
610 "Magnemite"
510-EM
4-Speed
'Magnemite"
610-DM
610-DEV
Multiple-Speed
VU
"Magnemite"
610-CDV
610-BCV
610-ABV
"Flyweight
Magnemite'
3 10- A
310-3
310-C
310-TD
310-SD
310-E
"Secret
Recorder"
210-B
210-BC
Speed
in sec.
l 7 /8
3'/4
7Yi
7'/j
15
IS
7Vi
3V 4
l'/a
7'/j
l 7 /8
l5 /u
15
7<2
7Vj
3 3 /«
3*4
l 7 /s
1 7 8
l5 /l4
l 7 /a
3%
7 '-j
7Vi
15
l's
l'/s
3V 4
Price
$225
255
275
295
335
395
355
445
405
365
345
340
290
320
340
360
400
349
369
Ampro
"Career"
Model 745
$159.50
"Hi-Fi Two Speed"
Model 757 $239.93
Model 75 7T $274.45
Ampro
"Classic"
Model 757A $257.50
Model 757AT $292.00
("T" in Model Nos. above
designates Radio Tuner)
Ampro "Consolette"
Mod. 757B (Blond), Mod. 757M (Mahogany) $279.95
Same, with radio tuner 314.45
Matching Floor Stand $17.50
Frequency
Response
100- 3,000 cps
50- 5,000 cps
50- 7,300 cps
50- 7,500 cps
50-15,000 cps
50-15,000 cps
50- 7,500 cps
50-15,000 cps
50- 7,500 cps
50- 5,000 cps
100- 3,000 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
100- 3,000 cps
50- 5,000 cps
60-11,000
cycles at
7'/2"/see.
70-6,000
cycles at
3 3 /4"/sec.
40-12,500
cycles at
7Vi"/sec.
40-6,000
cycles at
3V 4 "/sec.
40-12,500
cycles at
7' 2" sec.
40-6,000
cycles at
3 3 4" sec.
Same as
Model 757
Data
Completely self-contained, battery-operated portables
with spring motor drive. Models 610 B, C and TD are
dual track: others, single track. Winding interval, 3 to
15 min., depending on tape speed. Motor can be re-
wound while operating. Indicator light signals 30 sec-
onds before rewind. Playback through headphones or
external amplifier. Incoming signal can be monitored
while recording. Overall dimensions, 11" by 8" by 5
for 610 B; 11" by 10" by 7" for all others. Weight,
10 to 15 lb.
Completely self-contained, battery-operated portables
with spring motor drive. Model 610-DM is single or
dual track: Model 610-EM, single track. Speed change,
with automatic equalization, is by changing capstans.
Winding interval, 3 to 6 minutes. Motor can be re-
wound while operating. Indicator light signals 30 sec-
onds before rewind. Playback through headphones or
external amplifier. Incoming signal can be monitored
while recording. Overall dimensions, 11" by 10" by
7". Weight, 15 lb.
Operating features of VU "Magnemite" same as above,
except that built-in VU meter is provided to measure
recording level, output level and "A" and "B" bat-
teries. Calibrated volume control and high impedance
microphone jack also included. One, three and four-
speed models also available.
Portable, battery-operated electric motor driven re-
corders with single tape speed. Models 310-SD and
310E are single track, others dual track. Net weight,
only 8 lb. Max. reel size, 5". Rewind time, 2 min.
Earphone monitor and playback. No erase. PM erase
available as optional feature. Powered by 5 replaceable
mercury batteries. Dimensions, 5>/2" x 9" x 12".
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
feature. Weight complete, including briefcase, 1 1% lb.
Portable, dual-track, dual speed recorder with woofer-
tweeter two-speaker system. Electronic eye recording
level indicator. Rewind speed, 120" per second. Fast
forward editing button, pause lever. Power output,
5 watts. Telephone type input and output receptacles.
Weight, 25 lb.
Portable, dual-track, dual speed recorder with or with-
out built-in radio tuner. Includes "Piano Key" con-
trols, electronic eye recording level indicator, automatic
selection locator, and provision for mixing and moni-
toring live and radio-phono inputs. Flutter and wow,
less than 0.5%. Fast forward, 72"/sec. Rewind.
120"/sec. Signal-to-noise, 42 db. Power output, 3.2
watts. Built-in 6" x 9" PM speaker. Input receptacles
for microphone, radio-phono, or remote control.
Weight, 34 lb.
Portable dual-speed, dual track recorder designed for
heavy-duty school and institutional use. Case is highly
resistant to abuse and includes shock-absorbing rubber
runners around the side panels. Also available with
built-in radio tuner. Features and performance data
same as above.
Model 757 (or 757T) recorder enclosed in table-type
console with storage space for 45 hours of tape re-
cordings. Incorporates amplifier bypass for playback
through external hi-fi system if desired.
AIDW RECORD
Sepi.-Oet., 1955
17
Manufacturer
Model and Price
BELL &
HOWELL
COMPANY
7100McCormickRd
Chicago 45, III.
BELL SOUND
SYSTEMS, Inc.
Columbus 7,
Ohio
BERLANT
ASSOCIATES
4917 West
Jefferson Blvd.
Los Angeles 16,
California
Bell & Howell
"MIRACLE 2000"
Model 300-M
(dark mahogany)
$299.50
Model 300- B
(blond mahogany)
$314.50
Model RT-75
Three-Speed
Recorder
$164.95
Model RT-88
Two-Speed
Recorder
$139.95
Cub-Corder
Model 2260
(7'/2 and 3 3 /i"/se«.)
Model 2261
(3 3 4 and l'/e'Vsec.)
$224.95
"Concertone' 1
20 20 Series
Model TWR-2 Recorder and TWPA-10
Amplifier-Speaker Unit, in portable cases
$595.00 complete
Berlant
Series X Recorders
Model BRX-1
$595.00
Model BAX-1
(Automatic)
$745.00
Berlant
Stereo-Monaural
Recorder
Model SBX-4
$845.00
Model SBAX
(Automatic)
$995.00
Frequency
Response
50-12,000
cycles (±2 db)
at 7 Vi "/see.
30-12,000
cycles at
7'/2"/sec.
30-7,500
cycles at
3 J /4"/sec.
50-4,500
cycles at
1 7 / 8 "/sec.
50-10,000
cycles at
7 '/a "/sec.
200-6,000
cycles at
7 Vi "/sec.
40-15,000
cycles (±2 db)
at 15"/sec.
40-15,000
cycles - 4 db
at7'/2"/sec.
Data
Manufacturer
Table model dual-track recorder with tape speeds of TYl"
and 3^4" per sec. Three separate motors; for drive cap-
stan, feed reel and take-up reel. Push button controls
with safety interlock to prevent accidental erase. Speaker
system consists of two 8" "woofers" on opposite sides of
case and two electrostatic "tweeters" behind front grille.
Each electrostatic speaker is provided with 1000 small
apertures which act individually as miniature loud speak-
ers. Power output, 10 watts. Input jack for microphone,
radio or phonograph. Simple drop-in threading.
Combination radio-phono-tape recorder units (including
the "Miracle 2000") are also available, ranging from
approximately $500 to $2,000. Information on request
Portable dual-track recorder with single-lever speed selec-
tor for 7'/2", 3%" or V/%" per second. Pushbutton record-
ing switch with safety interlock. Fast forward and rewind.
Neon recording level indicator. 6" x 9" oval speaker.
Two microphone inputs and one radio-phono input. Out-
puts for external speaker and external amplifier. Power
output, 3.5 watts. Crystal microphone included. Weight.
35 lb.
Dual-track recorder with tape speeds of lYl" an< ^ '%"
per second. Pushbutton controls for tape speed, record,
play, fast forward, rewind and stop. Separate tone and
volume controls. Neon recording level indicator. Three-
motor operation. Inputs for microphone and radio-phono.
Outputs for external loudspeaker and monitor head-
phones. Power output, 3.5 watts. Weight, 27 lb.
Dual-track, two-speed battery operated portable. Has
microphone with built-in monitor playback level, minia-
ture transmitter for playback thru radio without connec-
tions to set, and wet cell batteries that can be recharged
from car cigarette lighter outlet. Output for external
amplifier. Fast forward and rewind, 37"/sec. Includes
ceramic microphone, shoulder strap, battery charger cable,
battery syringe, one 600-ft. reel of tape and take-up reel.
Weight, 12% lb.
Professional type dual-track, two-speed resorder available
in portable cases or for custom installation. Signal-to-noise
ratio, 55db. Total harmonic distortion, 2% at Zero V.U.
Total flutter and wow, less than 0.1% RMS at 15"/sec.
Rewind and fast forward, less than 60 sec. for 2500 ft.
V.U. meter reads record level, output level, bias current.
Monitors from tape or input. Includes 3 heads, with
provision for 2 more. Three motor drive. A-B test fader
and 2-channel mixer for mike and line inputs. Also avail-
able in stereo-monaural and single-track models. Weight,
45 lb. total.
Professional type broadcast recorders with single-track
erase and record heads and dual-track playback. Plays
both single and dual-track tapes. Automatic model, sole-
noid operated. Performance data same as for 20/20 series
above. Timing accuracy, better than 99.8%. Three motors,
including new improved hysteresis synchronous direct
drive motor. Two-channel input mixer, tape motion regu-
lator, A-B test fader and provision for five heads. Adjust-
able bias and simplified cueing and editing. Monitors
from tape or input. Also available in consolette and port-
able units.
Same as Series X above, except with four heads and two
amplifier units for extremely versatile stereophonic and
binaural recording. Each machine operates as 2 inde-
pendent recorders using a common reel of tape with the
two channels capable of being operated either separately
or in conjunction with each other. Records and plays
back single or dual track, monaural or binaural. Channel
Integrator ($19.95) permits sound-on-sound recording
with a single recorder, without erasing previously recorded
tracks. Model SBAX unit is solenoid operated.
WILCOX-GAY
CORPORATION
Charlotte,
Michigan
Model and Price
Recordio "PrestOmatic" Recorders
Model 5A
$129.95
Model 5M
$149.95
Model 5B
$169.95
Model 5F
$199.95
Recordio
"PrestOmatic"
Model 5U
$269.95
Tape-Disc Recordio
Model 4C-10 $199.95
Frequency
Response
85- 8,000 cycles
80- 8,500 cycles
80-10,500 cycles
70-10,500 cycles
65,15,000 cycles
80-6,000 cycles
at 3 V* "/sec.
Data
Portable, dual-track recorders with tape speeds of l]/l"
and 3%" per second. Signal-to-noise ratio, 35 db mini-
mum. Pushbutton operated with interlock to prevent ac-
cidental erase. Two neon recording level indicators. Fast
forward and rewind, less than 2^4" min. for 1200 ft.
Inputs for microphone and radio-phono. Output for ex-
ternal speaker. Crystal microphone included.
Model 5A: 4" round speaker. Weight, 26 lb.
Model 5M: 5" x 7" elliptical speaker. Weight, 28 lb.
Model 5B: One 4" and one 5" x 7" speaker. Visual tape
index. Weight, 28 lb.
Model 5F: Two 5" x 7" speakers. Visual tape index.
Weight, 35 lb.
Portable dual-track recorder with tape speeds of 1Yl
and 3%" per second. Signal-to-noise, 3 5 db minimum.
Wow and flutter 0.20% at 1Yl P er second. Machine
features same as for Model 5F above. Includes two 5" x
7" woofers and two electrostatic tweeters, three extension
speaker jacks, remote stop-start control and crystal micro-
phone with switch. Playback switch permits using mike
while playing or recording or when using set as phono
amplifier. Weight, 45 lb.
Portable combination tape and disc recording and repro-
ducing unit with iy 4 " tape speed and 78 rpm disc speed.
Records tape, discs, tape to disc or disc to tape. Weight,
30 lb.
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.
TAPE RECORDING ACCESSORIES
AUDIO SELF-TIMING LEADER TAPE
A strong, durable leader tape of white plastic
material — easily written on with ink or pencil.
Spaced markings permit accurate timing of
leader intervals.
100 ft., W wide, individually boxed.
Type No. 3L List Price,
$0.60
PERMACEL 91
SPLICING TAPE
Especially formulated for splicing mag-
netic recording tape. Adhesive will not
squeeze out, dry up or become brittle.
ADHESIVE REEL LABELS
Provide positive identification of your tapes,
right on the reel. Simply press to apply, pull off
to remove. Envelope of 30 2" x W labels.
Type No. 30 AL list Price, $0.25
Size
Type
List
No.
Price
1 Roll, W x 100", with metal
50 ST
$0.29
utility dispenser
1 Roll, W x 66 ft.
56 ST
0.76
1 Roll, V x 66 ft.
75 ST
1.01
AUDIO HEAD DEMAGNETIZER
Completely removes all permanent magnetism
from recording and reproducing heads in a
matter of seconds. Operates on 110 volts, 60
cycles. Individually boxed, with 7 ft. cord and
plug-
Type No. 400 List Price, $12.00
AUDIO HEAD ALIGNING TAPE
Pre-recorded at 2,000, 10,000 and 15,000 cps. at
15" per second, with precisely correct head azimuth
alignment. Provides a convenient and highly accu-
rate reference for aligning magnetic recording
head. Three hundred ft. on 5" reel, individually
boxed, with instructions.
Type No. 200 List Price, $12.00
lf>
AUDIO RECORD
Sept. -Oct., 1955
Manufacturer
J. c.
WARREN
CORPORATION
21 Hanse Ave.,
Freeport
N. Y.
Model and Price
WEBSTER-
CHICAGO
CORPORATION
5610
Bloomingdale Ave.,
Chicago 39,
III.
WEBSTER
ELECTRIC
CO.
Racine,
Wisconsin
Warren
Battery
Portable
$298.00
Speed
l5 /l<, ips
1 Vs ips
3 3 4 ips
7Vi ips
Webcor
Fantasy
Portable
Model 2614
$149.95
Table Model
2615
$159.95
(Prices $3
higher on
West Coast)
Webcor
Royal
Model
2611
$219.95
($5 higher on West Coast)
Frequency
Response
to 2,500 cycles
to 4,000 cycles
to 6,000 cycles
to 12,000 cycles
Data
Manufacturer
Portable dual-track tape recorder with completely self-
contained, battery powered tape transport, amplifier and
speaker for playback. Wet cell battery life up to five
hours, depending on tape speed. Has self-contained bat-
tery recharger. May be operated on AC. Rewind speed
10 to 1. Max. reel size, 5". May be operated with door
closed. Monitors while recording. Input for microphone
and headphone monitoring jack. Crystal microphone in-
cluded. Accessories: Snap-on legs ($10.00), Canvas carry-
ing case ($7.50) and shoulder strap ($5.00). Weight:
22 pounds. Sizes: 6" x 10" x 15".
to 7,000 cycles
at3 3 /4"/sec.
70-10,000 cycles
at 7 Vi "/sec.
to 7,000 cycles
at 3 J V sec.
to 10,000 cycles
at7'i" sec.
Webcor Royal Coronet
Model 2612 $249.95
($5 higher on West Coast)
Ekotape
Model
240
$189.50
Model
230
$219.50
Ekotape
Model
220
$239.50
Ekotape Model 222 (limed oak)
Ekotape Model 224 (mahogany)
$259.50
50-7,000 cycles
at 7 Vi ".'sec.
50-4,000 cycles
at 3% "/sec.
50-8,000 cycles
at 7'/j"/sec.
50-5,000 cycles
at3 J /i"/see.
50-10,000 cycles
at 7 Vi "/sec.
50-5,000 cycles
at 3 3 /4"/sec.
Dual-track, dual speed recorders in either portable or
table models. Simplified pushbutton operation. Monitor
control permits listening while recording. Editing switch,
separate volume and tone controls, fast forward and re-
wind. Two automatic volume recording indicators. Inputs
for microphone and radio-phono. Microphone included.
Output for external amplifier or speaker. Max. reel size,
7". Portable model available in black or tan. Table model
in walnut, mahogany, blonde or beige Plextone.
Portable, dual-track recorder with lYl" and 334" tape
speeds. Two magnetic recording heads — two 4-pole motors
— one knob control for record, playback and fast rewind
— new tape counter. Electronic eye recording level indi-
cator. Includes built-in 6" speaker and crystal microphone.
Inputs for microphone and radio-phono. Output for ex-
ternal speaker. Available in black or tan case.
Similar to above, but in larger case with three speakers
for balanced sound dispersion. Two magnetic recording
heads (as on Model 2611) permit recording in two direc-
tions of tape travel without reel turnover.
Portable dual-track recorders with TYl" ar >d 334" tape
speeds. Fast forward, 15 times tape speed. Fast rewind,
112"/sec. Central control selects tape direction, fast for-
ward, standard forward, rewind and stop. Auxiliary con-
trols for tape speed, play-record, volume, tone control.
Can monitor thru speaker while recording. Neon record-
ing level indicator. Inputs for microphone and radio-
phono. Output for external speaker. Crystal mike in-
cluded. Model 230 includes socket for plug in of remote
start-stop controls, and has 5" x 7" PM speaker. Model
240 has 5" round PM speaker.
Portable, dual-track recorder with 1Yl" and 334" tape
speeds. Fast forward, 1 5 times tape speed. Rewind,
112"/sec. Central and auxiliary controls same as above.
Includes socket in front of case for manual control (fur-
nished) or for remote stop and start controls. Includes
5" x 7" oval PM woofer and 3" round tweeter. Program
selection finder geared for maximum of 1800 ft. tape
capacity on 7" reel. Other features same as for models
described above.
Similar to Model 220, except in limed oak or mahogany
table cabinet with larger (6" x 9") oval PM woofer and
3" round tweeter.
BROADCAST
EQUIPMENT
SPECIALTIES
CORP.
P.O. Box 149
Beacon, N. Y.
COLUMBIA
RECORDS, Inc.
799 Seventh
Avenue,
New York 19,
N. Y.
Model and Price
Tapak
(tape-pack)
"Newscaster"
Standard Model
$329.25
Custom Model
$344.25
Frequency
Response
100-6,000
cycles
Tapak (tape-pack) "Narrator"
$359.25
Minigraph
Battery Operated
Pocket Size
Unit
$289.50
(Available
Dec. 1955)
50-9,000
cycles
Columbia
Model 461
$99.95
CRESCENT
INDUSTRIES,
INC.
5900 W. Touhy Ave.
Chicago 31,
III.
Columbia
Model 462
$149.95
Model
TR670
$99.95
Model
TR672
$119.95
100-6,000
cycles
1 00-4,000
cycles
Data
Completely self-contained, walkie-type tape recorder with
spring-powered transport mechanism and dry battery am-
plifier. Standard speed, lYl" per second, convertible to
3J4" P er sec - if desired. Adjustable to center or side track.
Records, erases, monitors and plays back through head-
phone, external amplifier or phone input of radio. Fast
rewind. Recording characteristics match studio equipment.
Standard model has 37 db dynamic range. Custom model
with transistor oscillator, has 55 db range. Fitted cover
holds mike, phone, flashlight: price includes all acces-
sories.
Same as "Newscaster" in appearance and functions, but
includes built-in 4" x 6" speaker and increased amplifica-
tion for reproduction of self-recorded or pre-recorded
tapes to room-size audiences. Standard speed, 1Yl" per
second, convertible to 354" per sec. if desired. Records
or plays up to 50 minutes on one-mil base tape.
50-9,000
cycles at
7Vi"/sec.
50-10,000
cycles at
7Vi"/sec.
Pocket-size, subminiature tape recorder. Records dual
track 1 hour total at 334" per second or 2 hours at 17/g"
per second. Records, erases, monitors and plays back
through earphone or external amplifier. Interlocks prevent
accidental erase or "double exposure". Special 4" reels
transferable to any recorder. DC motor operated from
1 5-hour mercury batteries. Dynamic range, 37 db. Wrist-
watch mike available as optional accessory.
Portable, dual-track recorder with lYl" per second tape
speed. Signal-to-noise ratio, 35 to 40 db. Fast forward
and rewind, 1200 ft. in 105 seconds. Automatic erase
when recording. Single master control and neon recording
level indicator. Includes 5" PM speaker, with jack for
auxiliary speaker. Can be used as PA system with or
without auxiliary speaker. Wooden cabinet with leather-
toned plastic covering. Complete with ceramic micro-
phone. Weight, 18J4 lb.
80-8,500
cycles at
7'/i"/sec.
Model
TR 673
$149.95
50-10,000
cycles at
7Vi"/see.
70-6,000
cycles at
3 3 /i"/sec.
Portable dual-track two speed recorder with lYl" and
3 %" per second tape speeds. Signal-to-noise ratio, 3 5 to
40 db. Fast forward and rewind, 1200 ft. in 105 seconds.
Automatic erase when recording. VU meter for accurate
recording level indication. Includes two 5" by 7" oval
PM speakers and jack for auxiliary speaker. Can be used
as PA system with or without auxiliary speaker. Single
master control switch. Wooden cabinet with leather-toned
plastic covering. Complete with ceramic microphone.
Weight, 231/2 lb.
Portable dual-track recorder with 7'/2"/sec. tape speed.
Fast forward and rewind, 1200 ft. in 90 seconds. 3-watt
amplifier and built-in speaker. Output for external ampli-
fier. Microphone included. Weight, 20 lb.
Portable dual-track recorder with lYl" and 334" per
second tape speeds. Wow and flutter, less than l/ 2 of 1%.
Inputs for mike and radio-phono. Output for external
amplifier. Microphone included. Weight, 22 lb.
Portable dual-track, dual speed recorder with two 6"
built-in speakers. Wow and flutter, less than Yl of \%.
Fast forward and rewind, 1 200 ft. in 80 seconds. Electronic
eye recording level indicator. 3-watt amplifier. Inputs for
mike and radio-phono. Outputs for external speaker plus
high impedance for external amplifier. Includes ceramic
microphone. Weight, 23 lb.
AUDIO RECORD
Sept. -Oct., 1955
Manufacturer
DAYSTROM
ELECTRIC
CORP.
753 Main St.
Poughkeepsie,
N. Y.
Model and Price
Crestwood
Model 304
Portable
$229.50
Model 310
in Walnut
Console
$339.50
Crestwood
"Hi-Fi" 404
Recorder & Preamp.
$229.50
Amplifier & Spkr.
$100.00
Recorder, Amplifier
& Spkr. in Walnut
Console $429.50
DeJUR
AMSCO
CORP.
45th & Northern
Blvd.,
Long Island
City, N. Y.
DuKANE
CORPORATION
St. Charles,
III.
EDUCATIONAL
LABORATORIES
INC.
1823 Jefferson
Place, N. W.
Washington 6,
D. C.
Crestwood
"Concerto"
Model 360
$299.50
De Jur
Model
TK820
$379.50
DuKane "Tru-Fidelity" Recorder
Model UA200
$395.00
DuKane
"Automatic"
Model UA240
$469.50
Educorder Dual
Model M-6
$239.00
Frequency
Response
50-10,000
cycles at
7'/2"/sec.
30-15,000
cycles at
7'/j"/see.
50-10,000
cycles at
7 Vi "/sec.
40-16,000
cycles (±2 db)
at 7Vi" sec.
50-10,000
cycles 2 db
at 3 3 /4"/sec.
50-10,000
cycles (±lVi db)
at7'/j"/see.
50-7,500
cycles (±l'/j db)
at 3% "/sec.
70-7,500
cycles at
7 Vi "/$ec.
70-5,000
cycles at
3 J /4"/see.
Data
Manufacturer
Portable dual-track recorder with 7'/2" and 3J4" ta P e
speeds. Takes up to 7" reels. Fast forward and rewind,
20:1 ratio. Power output, 10 watts. Distortion, not over
3% at 5 watts output. Wow and flutter, not over 0.3%
at 7J/2"/sec. Inputs for microphone, radio-phono. Out-
puts for external speaker and headphone monitor. Touch
controls for microphone or radio, record or play, bass
response, treble response. Push-pull speed change control.
Two-neon-lamp volume indicator. Microphone included.
Weight, 31 lb.
Portable dual-track recorder with 7W" and 3J4" ta P c
speeds. Takes up to 7" reels. Fast forward and rewind,
20:1 ratio. Power output, 10 watts. Distortion, less than
2%. Wow and flutter, not over 0.3% at 7J/2"/sec. Pro-
vision for head alignment. Inputs for microphone, radio-
phono. Outputs for monitor and power amplifier. Elec-
tronic eye recording level indicator. Jack for VU meter.
Weight, 28 lb.
Model 402 power amplifier with 10-watt output and 8"
speaker weighs 17'/2 lb. Jack provided for external
speaker.
Model 304 recorder unit mounted in mahogany or limed
oak table consolette, containing two speakers properly
baffled for full range music reproduction. Also available
with legs for use as an arm chair height console.
Portable dual-track recorder with hysteresis synchronous,
dual speed reversible motor and push-button track re-
versal. All functions electronically controlled by piano
key switchboard relay operation. Four separate erase and
record-playback heads. Illuminated program selector. Elec-
tronic eye recording level indicator. Signal-to-noise, 55 db.
Flutter and wow, 0.1% at 7'/2"/sec. Harmonic distor-
tion, 0.8% at full rated output. Power output, 6 watts
undistorted. Rewind time, 90 sec. for 1200 ft. either direc-
tion. Inputs: 2 high impedance, 1 low impedance. Out-
puts: 1 high impedance, 1 low impedance. Three PM
speakers and 2 electrostatic tweeters. Includes cardioid
dynamic mike.
Portable, dual-track, dual-speed recorder with IVi watt
power output. Signal-to-noise ratio, 50 db on playback,
distortion less than 5% at full output. Rewind time, 80
seconds for 7" reel. Fast forward, 100 seconds for 7" reel.
Output for auxiliary speaker, monitor headphone and for
feeding to input of another recorder for direct tape copy-
ing. Inputs for microphone, phonograph, radio. Electronic
eye recording level indicator, automatic footage counter
and exclusive Room Balance Control. Weight, 39 lb.
Same as Model 11A75 above, but designed for fully
automatic sound slidefilm projection in conjunction with
DuKane push-button filmstrip projector. A 40 cycle signal
recorded on the tape changes pictures automatically with-
out any audible cues.
A complete portable, two-channel two-speed tape re-
corder. Each channel has its own amplifier and separate
record-reproduce and erase heads. Can be used for
binaural recording or playback, or for recording on one
channel while listening to the other, permitting two-part
recordings, duets, comparison drills, etc. Meter recording
indicator, tape-film synchronizer (optional) and many
other features.
TELECTRO-
SONIC
CORPORATION
35-18 37th St.
Long Island City 1,
N.Y.
THREE
DIMENSION
COMPANY
Division of
Bell & Howell
3512 N. Kostner
Ave.,
Chicago 41,
III.
VIKING OF
MINNEAPOLIS
3520 E. 43rd St.
Minneapolis 6,
Minn.
V-M
CORPORATION
Benton Harbor,
Michigan
Model and Price
Telectro-
tape
Custom
220
$99.50
(without case)
xSJ
Telectro-tape Professional 1000
Two-Unit Portable
(Price on request)
TDC
Stereotone'
Portable
$229.50
Viking
Full Fidelity
75
Tape Deck
FF75 Monaural Playback Unit $59.95
FF75B Binaural Playback Unit $69.95
FF75R Monaural Record-Playback
Unit $67.45
tape-o-matic"
Model 700
$179.95
Frequency
Response
flat to
about
6500
cycles at
3 3 /«"/sec.
50-12,000
cycles (±3 db)
at7Vi"/see.
30-15,000
cycles (±2 db)
at 15"/sec.
30-15,000
cycles ( - -4 db
at 7 Vi "/sec.
30-10,000
cycles (±2 db)
at 7'/2"/sec.
50-10,000
cycles (±2 db)
at 7 Vi "/sec.
50-8,000
cycles (±3 db)
at 3 J/4 "/sec.
40-14,000
cycles at
7'/2"/sec.
(depending
on amplifier)
70-15,000
cycles (±5 db)
at 7Vi"/sec.
Data
Light-weight, dual-track recorder with 3%" tape speed.
Handles up to 5" reels, providing up to 1 hour recording
time. Wow and flutter, approximately 0.5%. High im-
pedance microphone input may also be used for radio
input. Extremely simple threading and operation. Neon
bulb recording level indicator. Weight, 16 lb. Includes
crystal microphone with stand. Built-in speaker.
Basic dual speed recorder (7'/2" and 324"/sec.) unit
with recording amplifier, playback pre-amp and erase
oscillator for custom, table or portable mounting. Signal-
to-noise, 45 db. Distortion, less than 2%. Flutter and
wow, less than 0.3% RMS. Max. reel size. 7". Electronic
eye recording level indicator. Inputs for microphone and
radio-phono. Also available: Custom 220P monaural tape
player ($49.50) and Custom 220BMP binaural and
monaural tape player. ($61.50). Tape player prices cover
mechanism only.
Professional type two-unit, dual-track portable with 15"
and 71/2" tape speeds. Signal-to-noise, over 55 db at both
speeds. Distortion, less than 2% RMS. Flutter and wow,
less than 0.2% at 15"/sec. Starting time, less than 0.1
second. Stopping distance, less than 2" at 15"/sec. Play-
back timing accuracy, better than 0.2%. Max. reel size,
lOJ/i". Pushbutton controls, A-B monitor switch, input
selector switch, VU meter switch for playback level, record
level, bias and erase current. Output, 600 ohms balanced.
Remote control available.
Portable, two-speed dual-track recorder. Vertical design
with 10-inch extended range speaker. Three separate
motors with electro-magnetic braking and interlocking
push-button control. Distortion less than 3% at half out-
put. Signal to noise ratio better than 36 db. Wow and
flutter below 0.2% at lYi'/sec. 7-tube amplifier with
push-pull output delivers over 8 watts audio. Fast forward
and rewind, 1200 feet in 40 seconds. Program indicator
for permanent pin-point referencing. Two output jack
for connecting either external amplifier or extension
speaker. Prices include controlled reluctance microphone,
power cord, radio-phono patch cord, and spare 7" reel.
Neon indicators for volume and bass-treble controls. Two
position speaker. Can be used as public address. Record
safety lock. Controls: stop, forward, rewind, play, speaker,
record.
Tape Playback and Record-Playback units for custom
installation in hi-fi systems. Tape speed, 7|/7"/sec., with
belt change for 3?4"/sec. Signal-to-noise. 45 db or more.
Flutter, 0.2% or less. Maximum reel size, 7". Total har-
monic distortion, less than 1.0% with NARTB com-
pensated preamplifier and NARTB recorded tape. Also
available with tapelifter and pressure pad. Weight, basic
unit, 9 lb.
Viking matched PB60 playback preamplifier — $24.50.
Viking matched RP61 record-playback amplifier also
available — $74.50.
Portable carrying case for FF75R and RP61— $19.95.
Portable two-speed, dual-track recorder with push-button
controls and two speakers — one "woofer" and one
"tweeter". Flutter and wow, less than 0.5% Concealed
60-cycle hum control and bass boost. Includes tape index
timer, record-ready light, "distort" light, tape-speed but-
ton, treble and bass control, monitor switch, "pause"
button for silent momentary stops, safety interlock to pre-
vent accidental erase. Inputs for microphone, radio-phono
jack, radio '"patch cord", and magnetic phono jack. Out-
put jacks for external speaker and external plus internal
speakers.
1»
41DIO RECORD
Sept. -Oct.. 1955
Manufacturer
THE
STANCH-
HOFFMAN
CORP.
921 North
Highland Ave.,
Hollywood 38,
Cal.
TAPE
RECORDERS,
INC.
1501 W. Congress
Street,
Chicago 7, III.
Model and Price
Model R-5 $1,575.00
Model S6
Synchronous
Magnetic
Film
Recorder
$1,500.00
Frequency
Response
50-15,000
cycles (±1 db)
at 15'Vsee.
45-10,000
cycles (±2 db)
16mm and
17.5mm film
Model CRM-15
Multi-Channel
Communications
Recorder
(Prices on Request)
TRI-FY
"Dixie-Land'
Model 110
$129.95
TRI-FY
''Continental'
Model 220
$189.95
200-7,500
cycles (±3 db)
at 7'/i"/sec.
200-3,500
cycles (±3 db)
at 3Vi" see.
50-7,500
cycles at
7 '/i "sec.
70-4,500
cycles at
3 3 4" sec.
Data
Manufacturer
Portable, professional-type, single-track recorder with tape
speeds of 7J/ 2 and 15" (or 3J4 and IVl") per sec. Signal-
to-noise ratio, over 60 db. Separate record and playback
heads and amplifiers with independent monitor amplifier
and speaker.
Synchronous magnetic film equipment for motion picture
and TV sound recording. Designed for 24 volt battery
operation, 110 volt single phase or 220 volt 3 phase. The
equipment is very lightweight and housed in small light-
weight cases for easy portability.
Signal-to-noise : at least 5 5 db.
Maximum harmonic distortion: 1.5% from full level.
Film capacity: 1000 feet.
50-8,500
cycles at
7'2"/sec.
50-5,000
cycles at
3 3 'i"/see.
TRI-FY
"Carousel"
50-12,000
tape
cycles at
player
7'/2"/see.
and
recorder
50-6,000
cycles at
Model 330
3 3 /4"/sec.
$239.95
Provides up to 15 simultaneous recording channels on
0.7" wide tape. Recording time, up to 4'/2 hours for
5,000 foot reel. Two units, with automatic sequence con-
trol permit continuous, 24-hour recording. Signal-to- noise,
at least 40 db. Distortion, not more than 5% total har-
monic at "0" input level. Negligible crosstalk between
channels. Push-button control. Fast forward and rewind.
Automatic stop.
Portable, dual-track, two-speed tape recorder with re-
placeable plug-in type record-playback head. Signal-to-
noise ratio, over 40 db. Flutter and wow, less than 0.5%.
Fast forward and rewind, 1 5 to 1 ratio. Tape Guide
slotting for perfect tape alignment. Inputs for microphone
and radio-phono. Output for external speaker and moni-
tor headphones. Includes 5" speaker and microphone.
Foot control optional. Weight, 24 lb.
Portable dual track, dual speed recorder with built-in
6-tube AM radio. Mixer circuit permits simultaneous
recording from microphone and radio Signal-to-noise,
over 45 db. Flutter and wow, less than 0.5%. Fast for-
ward and rewind, 1 5 to 1 ratio. Neon bulb recording level
indicator. Plug-in record-reproduce head assembly with
tape guide slotting. Inputs for mike and external radio-
phono. Outputs for external speaker and headphones.
Weight, 29 lb.
Compact dual-track recorder with infinitely variable tape
speeds from 3" to 8" per second. Reverses track auto-
matically at end of reel. Provides up to 8 hours non-
repeat programming on IOI/2" reel without adapter.
Flutter and wow, less than 0.3%. Fast forward and
rewind. Neon bulb recording level indicator. Inputs for
high or low impedance mike and radio-phono. Outputs
for external speaker, hi-fi amplifier, VU meter and monitor
headphones. Weight. 21 lb.
EDUCATIONAL
LABORATORIES
INC.
1823 Jefferson
Place, N. W.
Washington 6,
D. C.
Model and Price
Educorder
Dual
Model
M-7
$295.00
Educorder Dual
Model M-8
S389.00
ELECTRONIC
TEACHING
LABORATORIES
1818 M Street
Northwest,
Washington 6,
D.C.
ELECTRO-
SONIC
SPECIALTIES
7230 Clinton Rd.
Upper Darby, Pa.
Electro-Dual
Binaural
Portable
Model E-2
$495.00
Audio-Visual
Electro-Dual
Binaural
Portable
Model E-2AV
$630.00
Electro-Dual Binaural Language
Laboratory Console, Model E-2CL
$575.00
Frequency
Response
70-8,000
cycles at
7 Vi "/ sec.
70-5,000
cycles at
3'/4"/sec.
50-12,00 cycles
at 7 } 2" sec.
50-7,500 cycles
at3 3 4" sec.
40-8,000
cycles (±2 db)
at3 3 ,4"/sec.
40-8,000
cycles (±2 db)
ut3'/4"/sec.
Data
A higher power output model (nearly 5 watts per channel),
the M-7 features a well-known pushbutton tape mecha-
nism, improved frequency response and extremely com-
pact design, in addition to all the above interesting opera-
tional possibilities of a complete two channel rape recorder
with independent control of each channel. Matching
speaker case available (two 12" speakers, for binaural or
combined playback).
A professional quality model with performance on each
channel close to NARTB standards and over 5 watts
audio power per channel. Three motor tape drive, positive
drag and braking, no pressure pads. VU meter.
Portable dual parallel track recorder with two separate
recording and reproducing channels. Modified binaural
circuit permits recording on one channel while listening
to pre-recorded teaching material on parallel channel.
Outputs for binaural or standard headphones. Safety fea-
ture prevents erasure of pre-recorded tapes. Safety inter-
lock coupled to drive when either amplifier is in Record
position. Includes provision for head azimuth alignment.
Separate recording level meters for each channel. Size,
23" x 11" x 6". Weight, 29 lb.
Memocorder
$365.00
Memotape
$405.00
Memograf
$700.00
Fidelivox Continuous Tape
Reproducer for Background Music
$665.00
(as above)
100-6,000
cycles at
3 3 /4"/sec.
100-6,000
cycles at
3 3 j" sec.
100-6,000
cycles at
3 3 /4"/see.
40-15,000 cycles
at 7' 2" sec.
40-7,500 cycles
at 3 3 4" sec.
Consists of standard Electro-Dual E-2 with Electro-
Synchronizer to match, automatic film strip projector and
associated connectors. Designed to play back sound track
and automatically advance film strip or (alternatively)
slide projection. Electro-Synchronizer has 4 watt auxiliary
power amplifier. Model G Electro-Synchronizer can be
used for same purpose with any other recorder without
synchronized signal being necessary.
Model E-2 recorder in collapsible portable booth-type
console wired for external audio and power supply. Elimi-
nates under-floor wiring. Any console may serve as master
signal source.
The MEMO line is intended for the clinical psychiatrist
and psychologist, for voice recording and reproduction.
Portable unit for out-of-office interviews. Maximum sim-
plicity of threading and operation. Record amplifier in-
cludes automatic volume compressor. Unnecessary for
operator to set or adjust volume level. Single track record-
ing with cueing channel for other track. Remote push-
button control for cueing. Maximum reel size. 7".
Heavy duty professional recorder designed for rack
mounting. Same basic simplicity of threading and opera-
tion as portable Memocorder above. Includes remote start-
ing, stopping and cueing controlled from consultation
room. Automatic gain control — good recordings at any
speech level. Separate head for monitoring from tape
while recording. Low impedance input for long micro-
phone lines. Maximum reel size, 7".
Professional transcription machine designed as companion
unit to Memotape. One Memograf can serve 6 to 10
Memotapes. Fast shuttle speed and Auto-Que light enable
typist to spot and transcribe notes quickly. Pedal control
leaves both hands free for typing. All control switches
on machine clearly marked as to function. Heads always
accessible for cleaning without removal of covers. Ample
storage space in console compartments.
Rack mounted playback unit accommodating up to 14"
reels. Signal-to-noise, over 50 db. Three-motor drive.
Simple to thread and use. Automatic reversal and shut-off.
Data on request.
41 DIO RECORD
Sept. -Oct., 1955
13
Manufacturer
EMC
RECORDINGS
CORP.
806 E. 7th St.
St. Paul 6,
Minn.
FAIRCHILD
RECORDING
EQUIPMENT
CORP.
154th St. and
7th Ave.
Whitestone 57,
N. Y.
FEDERAL
MANUFAC-
TURING AND
ENGINEERING
CORP.
199-217
Steuben St.
Brooklyn 5,
N. Y.
INTERNA-
TIONAL
RADIO AND
ELECTRONICS
CORPORATION
South 17th St.
& Mishawaka Rd.
Elkhart,
Ind.
Model and Price
EMC Tape
Players
Model 375
$79.95
Model 750
$79.95
Console
Model
Unit 126
$2,750.00
Console
Model
"PIC-SYNC"
$4,000.00
Control Track Generator
Model 41 $125.00
FME
Model 37-C
$139.95
FME
Model 47-A
$159.50
FME Tape Teck (47A in unfinished case)
$149.50
Crown
Deluxe
$379.50
Crown
Broadcaster
$399.50
"CROWN"
Professional
Series
Crown
Imperial
$425.00
i- « c*?e
"CROWN"
LP
Recorder
$449.50
Frequency
Response
100-6,000
cycles at
3 3 4" sec.
80-12,000
cycles at
7'j" sec.
50-15,000
cycles (±1 db)
at 15"/see.
50-15,000
cycles (±1 db)
at 15"/sec.
50-12,000
cycles at
7' i" sec.
50-7,000
cycles at
3%'Vsac
30-15,000
cycles (±2 db)
at 15"/sec.
40-12,000
cycles (±2 db)
at 7 Vi "/sec.
40-8,000
cycles (±3 db)
at 3 'V /sec.
Data
Manufacturer
Table-model tape playback units with either 71/2" or 3J4"
per second tape speed. No provision for recording. No
danger of accidental erase. Signal-to-noise; 3 5 db for
Model 375, 38 db for Model 750. Distortion at peak
output, less than J%. Dual track heads play back single
or dual track tapes. Output, 4.5 watts. Built-in 5" PM
speaker, with jack for external speaker. Model 750 also
includes a high-impedance output. Weight, 15 lb.
Professional type, single-track recorder with 1 5"
71/ "
tape
distortion -64 db (ref. 2Yl% dist.). Adjustable bias.
Speed tolerance, 0.1%. Built-in VU meter and circuit
checking. Unit-type, plug-in chassis. Automatic stop —
instant braking and reversal. Full protection against acci-
dental erase.
Same as model 126 with the addition of lip synchronous
operation. Used with motion picture camera and film pro-
jector, synchronous sound tracks are made and played
back on Y4" tape, with no interconnecting equipment.
Automatic Framing, which assures correct cueing of tape
and film, available at additional cost. Other applications
include Facsimile recording, multi-track, and telemeter-
ing, with frequency response to 100 KC.
Portable light weight unit for "On Location" picture
synchronous sound track recording on 1/4" tape. Used
with any portable tape recorder with 1 5"/sec. tape speed
and frequency response good to 14 KC, a control track
is simultaneously applied which later becomes the tape
speed control when played back on Pic-Sync recorder.
Portable dual-track, dual speed recorder operating at
7'/2" and 3^4" per second. Signal-to-noise, 43 db. Flutter,
less than 0.5%. Fast forward and rewind, 20-to-l ratio.
Safety lock prevents accidental erase. Instand stop lever
for editing. Neon recording level indicator. Power output,
3 watts. 5" x 7" elliptical PM speaker. Input jack for
microphone or radio-phono. Output jack for external
speaker. Ceramic mike included. Weight, 27 lb.
Portable dual-track, dual speed recorder. Embodies all
features of the Model 37-C above, plus a drum-type,
automatic reversible counter, monitor and hi-fi jack for
monitoring with earphones while recording or for playing
back through an external hi-fi amplifier. Also has improved
fast-forward lever for one-hand operation. Includes ce-
ramic mike and patch cord with built-in resistance network
to match recorder. Weight, 27 lb.
Unfinished Tape Deck is for installation in hi-fi setup.
Portable, 3-motor, 3-speed recorder-reproducer units
operating at 15". lYl" an d 3%" per second. Signal-to-
noise, 54 db at 15"/sec: 52 db at 7'/i"/sec; and 44 db
at 3%"/sec. Flutter and wow, less than 0.12% at 15"/sec.
Fast forward and rewind. 3 5 sec. for 1200-ft. reel. Include
1 phono and 2 microphone inputs; output jacks for 16.
8 y 4 ohms, 2 high-level mix input channels; 8" 9 watt
speaker. Provides full P. A. facility even while recording
Amplifier output, 3 5 watts peak at less than 4% distortion:
15 watts at 1%; 8 watts at 0.5%. Choice of full or half-
track heads (interchangeable, plug-in type).
Deluxe model has electronic eye. Broadcaster model hat
VU meter. Imperial model has VU meter and will handle
10!/ 2 " reels.
Same features as Crown Imperial, but designed to accom-
modate standard 14", 5000 ft. reels. At 3^4 " per second,
that gives a total, non-stop recording or playback time of
4 hours and 26 minutes — almost 9 hours dual-track.
Speed reducer (available for all Crown models) gives an
additional tape speed of 1%" per second.
RANGERTONE
INC.
73 Winthrop St.,
Newark 4,
N. J.
REVERE
CAMERA
COMPANY
230 East 21st St.
Chicago 16,
III.
Model and Price
"Rangerette"
Portable Model A-2
$1,500.00
complete
Console
Model
R-5C
with synchronizer
(Price on Request)
Model T-700D
$212.50
Model TR-800D
(with radio)
$265.00
Model T-700
$225.00
Model TR-800
(with radio)
$277.50
Model T-10
$235.00
Model TR-20
(with radio)
$287.50
Model T-700 B&M $235.00
Model TR-800 B&M (with radio) $287.50
Model T-10 B&M $245.00
Model TR-20 B&M (with radio) $297.50
Model T-UOO
$159.50
Model TR-1200
(with radio)
$209.50
Model T-900
$199.50
Model TR-1000
(with radio)
$249.50
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-l 1
$264.50
Frequency
Response
45-15,000
cycles (±2 db)
at 15"/sec.
50-8,000
cycles (±2 db)
at7Vi"/se«.
45-15,000
cycles (±2 db)
at 15" sec.
50-8,000
cycles (±2 db)
at7'/2"/sec.
40-14,500
cycles (±3db)
at 7' 2" sec.
40-7,500
cycles - 3 db
at 3 3 -4" sec.
80-8,000
cycles 3 db
at 3 3 4" sec.
60-15,000
cycles 3 db
at 7 1 2" sec.
as above
85-7,000
cycles 1 - 3 db.
at 3 3 4" sec.
75-12,000
cycles 3 db
at 7' 2" sec.
85-7,500
cycles - 3 db
at 3 3 4" sec.
85-7,500
cycles - 3 db
at3 3 4" sec.
100-5,000
cycles (±3db)
at 1 7 /a" sec.
40-16,000
cycles (±3db)
at 7' 2" sec.
Data
FOR SYNCHRONOUS SOUND RECORDING
Professional-type, single-track, dual-speed recorders, with
choice of 3%", 7Yl"> 15" or 30" per second tape speeds
Up to 2 hours recording at IY2" P er 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" synchroniza-
tion for motion picture and TV applications. Weight of
Rangerette — 30 lb.
Kits added to other professional recorders for Synchronous
Sound Recording for $295.00.
Portable dual track recorder available in either single or
dual speed. Convenient keyboard control, electrical sole-
noid operated. Signal to noise ratio over 48 db on dual
speed machines and 50 db on single. Distortion less than
0.65% 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. Provision for electrical remote
controls.
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 in either single
(3fi ips.) or dual (3J-4 - lYl ip s ) 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 PA. Weight, 28 lb.
Portable, dual-track recorder available in either l^g or
3?4 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, 2 5 lb.
High fidelity IOJ/2" reel tape recorder for professional
use and custom installations. Guaranteed specifications,
signal-to-noise, over 50 db, wow and flutter less than
0.2%. Over-all harmonic distortion, 0.65%; inter-modu-
lation distortion, less than 2%. Features: One volt cathode
follower pre-amplifier output. Monitor amplifier with
2'/2 watt output. Adjustable 70Kc bias-erase oscillator
with indicator. Less than Yl second start and stop. Auto-
matic head demagnetizing. Precision revolution tape
counter. Electrical remote with automatic drive roller
release.
12
AUDIO RECORD
Sept. -Oct., 1955
Manufacturer
PRESTO
RECORDING
CORPORATION
P.O. Box 500,
ParamuS/
New Jersey
RADIO
CORPORATION
OF AMERICA
RCA Victor
Division
Camden 2.
N.J.
Model and Price
Model SR-27
Complete with
A-920 amplifier
$485.00
Model A-920
Amplifier
$324.00
Model R-ll
Recording
Mechanism
(in carrying case)
$827.00
Chassis Only
$775.00
Model SR- 11
Recording
Console
$125.00
Model PB-17A
Tape
Reproducing
Mechanism
$700.00
Model A-904
Amplifier
$146.00
Continuous Tape Reproducing Console
$996.00
Model 7TR3
Portable
$189.95
Model RT-11B
Cabinet Rack Mounted
$895.00
Model RT-12C Console
$1070.00
Frequency
Response
50-15,000
cycles at
15"/sec.
50-10,000
cycles at
7Vi"/ioc.
50-15,000
cycles at
15" sec.
50-10,000
cycles at
7*2" sec.
50-8,000
cycles at
3 3 j" sec.
50-8.000
cycles at
3%"/sec.
70-10,000
cycles at
7' i" sec.
70-5,000
cycles at
3 3 .i" sec.
50-15,000
cycles (±2 db)
at 15"/sec.
50-10,000
cycles (±2 db)
at 7 Vi" sec.
Data
Manufacturer
Professional type two-speed equipment for portable or
stationary use. Tape transport mechanism has true three-
motor drive and separate erase, record and reproducing
heads. A-920 amplifier consists of microphone preamp,
reproduce preamp, power amplifier and power supply.
Includes twin speakers for playback. Monitors from input
or tape while recording. Input for microphone or high
impedance bridging. Output; 10 watts at 15 ohms, line
level at 500 ohms. Monitor ouput for headphones. Max.
reel size, 8".
Professional type portable tape mechanism with three-
head assembly: erase — record — reproduce. Brakes and
capstan pressure pulley solenoid operated. Dual-speed
motor heavy-duty capstan drive unit, with tape reels
mounted directly on individual torque motors. Flutter
0.15% at 15"/sec. Signal-to-noise, 55 db. Simplified
threading, easy access to heads.
Professional console-type unit, consists of R-l 1 mechanism
and 901 -A amplifier. 900- A amplifier may be substituted
if desired. Tape transport panel and amplifier panel are
hinged — every component readily accessible.
Dual-track reproducing mechanism with 3^4" tape speed
and automatic reversal, giving up to 8 hours of continuous
music on a 4800-ft. reel. At end of this time, mechanism
may be made to recycle or stop. Heavy duty capstan drive
unit with individual torque motors for each reel. Signal-
to-noise, 55 db. Flutter 0.35% at V/*" speed.
Long-playing tape reproducing unit consisting of PB-17A
tape transport mechanism and A-904 Amplifier in console
cabinet with dust-protective plastic top. Dynamic range,
45 db. Also available with PB-15A mechanism, which is
similar to PB-17A except with IOY2" ree ' capacity only.
Portable, dual-track recorder with tape speeds of 7 J/2"
and 3%"/sec. Push-button controls for play, record, fast
forward, rewind and stop. Rewind time. 2 min. for 1200
ft. Normal and overload neon bulbs for recording level.
Counter for indicating relative tape position. Built-in
microphone well for ceramic mike facilitates use and
storage. Voice-music switch for microphone recording.
Inputs for microphone and radio-phono. Includes 6Yz"
PM woofer and two iYi" PM tweeters. Output jack for
external speaker. Power ouput, 2 watts. Max. reel size, 7".
Professional type, dual-speed tape recording equipment
available in cabinet rack or console mounting. Three sepa
rate heads, with automatic tape lift on fast forward or re-
wind. Automatic "tape break" stop. Local or remote push-
button control of all functions. Signal-to-noise ratio; 60 db
at 15"/sec, 55 db at 7'/2"/sec. Wow and flutter com-
bined; 0.1% RMS at 15"/sec, 0.2% at 7J/ 2 "/sec. Dis-
tortion, 3% total RMS harmonic at 400 cycles, reference
recording level. Timing accuracy; ±5 seconds in 30 min.
(machine to machine), ±2J/2 seconds in 30 min. when
played back on same machine at same temperature and
humidity. Capstan is synchronous. Start and stop. 0.1
second. Rewind speed. 1 min for lOJ/j" reel
LIVINGSTON
ELECTRONIC
CORPORATION
Livingston, N. J.
MAGNECORD
INC.
1101 S. Kilbourn
Ave.
Chicago 24, III.
MAGNETIC
RECORDERS
COMPANY
7120 Melrose Ave.
Los Angeles 46,
Cal.
MAGNETIC
RECORDING
INDUSTRIES
II East 16th St.
New York 3,
N. Y.
Model and Price
Binoural-
Monaural
Tape
Playback
Unit
$119.50
F 35-B "Citation"
$349
(in portable case)
Model S 36-8
$370
(for rack mounting)
Model P60AX
(without case)
$390
Model P60B81
(with amplifier
and carrying
case)
$625
Portable
Reporter"
Standard
Model
$199.50
Deluxe
Model
$237.50
Voice-Master Dispatcher
Voice Master Streamliner
Voice-Master Companion
Voice-Master Ordertaker
$255
165
199
155
Frequency
Response
Data
20-20,000
cycles (±2 db)
at7'i" sec.
(when
properly
equalized)
F35-B (-2 db)
50-10,000 at 7' 1 '
50- 5,000 at 3 V4"
S36-B (-2 db)
50-15,000 at 15"
50-12,000 at 7 Vi"
40-15,000
cycles l±3 db)
at 15" sec.
40-10,000
cycles (=2 db)
at 7' 2" sec.
M81 Series 2 db
50-15,000 at 15"
50-10,000 at 7 V 2 "
M90 Series 2 db
30-15,000 at 15"
40-12,000 at 7'/2"
80-7,000
cycles
100-4,500 cps
100-4,500 cps
100-6,000 cps
100-4,500 cps
Attractively styled tape playback unit with 7J/2" per
second tape speed. Does not record and cannot erase
recorded tapes. Arranged for monaural or binaural play-
back of single or dual track tapes. Rewind time, 75 seconds
for 1200 ft. Amplifier and speaker not included. Output
level, 5 millivolts from tape recorded at Zero VU. Output
impedance, 1800 ohms at 1000 cps, variable with fre-
quency. Max. reel size, 7". Also available without case
for custom installation.
Professional type two-speed units for portable, rack or
custom mounting. F35-B: 71/2" and 324"/sec. S/N,
45 db half track. S36-B: 15" and 7J/ 2 "/sec. S/N, 54 db
full track. Hysteresis synchronous motor drive. Speed
varied by capstan change. Both units have rewind time of
40 sec. for 1200 ft. Control knob interlocked to prevent
accidental erase. Illuminated VU meter. Monitor jack on
front panel. Separate record and playback amplifiers. In-
puts for microphone and radio-phono. Cathode follower
output. F3 5-B includes speaker and ceramic microphone.
Professional portable or rack mount unit with 71/2 " and
15" tape speeds. Direct motor capstan drive with torque
motor takeup. Pushbutton controls, automatic tape lift
and tape break control. Separate erase, record and play-
back heads. Signal-to- noise, 55 db full track. Flutter and
wow 0.2% at 1 5"/sec. Timing accuracy, ±3 sec. in 30 min.
Fast forward and tewind, 90 sec. for 2 500 ft. Adjustable
bias, cueing control, deep slot loading. Amplifier has high
impedance and unbalanced bridge inputs. Cathode fol-
lower unbalanced output. Illuminated 4" VU meter.
Professional type dual speed units with 3 motor drive.
M81 series: signal-to-noise, 55 db: flutter and wow less
than 0.15% at 15"/sec. M90 series: signal-to-noise, 58
db; flutter and wow less than 0.1% at 15"/sec. Maximum
flexibility of remote control. All units have timing accu-
racy ±3 sec. in 30 min., fast forward and rewind 55 sec.
for 2500 ft. Pushbutton controls, single or dual track
heads. 4" VU meter for bias, record and reproduce level.
Separate record and playback amplifier. Monitor from tape
while recording. Console units have tip-out panels for
easy servicing.
Portable, battery-operated recorder with spring motor
drive. Power for amplifier furnished by dry batteries.
Spring drive lasts for 7 minutes at 7l/2"/sec. tape speed.
Can also be adjusted for 3J^"/sec. tape speed. Can be
rewound while recording. Single control — off, playback
record. Complete with batteries, microphone, head phone
(or speaker) and tape. Standard Model includes provision
for headphone playback only. Deluxe Model includes out-
put amplifier and loudspeaker. Weight, 12 lb. Made in
England.
Magnetic Disc dictating and transcribing machines record-
ing on pre-grooved, reusable magnetic discs. Features in-
clude manual, semi-automatic or fully automatic control,
automatic error correction, direct disc indexing, instant
stop-start, and syllable-controlled backspacing (from mike
or foot control). Weight, 12 lb. Fully automatic dictating-
transcribing unit in portable case also available.
Semi-automatic dictating-transcribing unit
Manual control dictating unit
Fully automatic transcribing unit
Telephone recording unit
10
AlDIO RECORD
Sept. -Oct., 1955
11
Manufacturer
MAGNETIC
RECORDING
INDUSTRIES
11 East 16th St.
New York 3,
N. Y.
MARK
SIMPSON
MFG. CO.
INC.
32-28 49th St.,
Long Island City 3,
N. Y.
Model and Price
"Synchrotone"
Dual
Magnetic
Recorder
Model VM-62-1
$289.00
Frequency
Response
to 10,000
cycles
at7>/j"/sec.
Magneticon Add-A-Booth
Language Laboratories
"MASCO"
Model 53
$250.00
Model 53R
(with radio)
$290.00
MITCHELL
MANUFAC-
TURING
COMPANY
2525 Claybourn
Ave.
Chicago 14,
III.
MOHAWK
BUSINESS
MACHINES
CORP.
Brooklyn 33, N.Y.
OERLIKON
TOOL & ARMS
CORP. OF
AMERICA
Business
Machines Div.
P.O. Box 3049
Asheville, N.C.
"MASCO"
Model 500
$168.50
Mitchell
Model 1425
$139.95
Mohawk "Midgetape"
Battery Operated Portable
$249.50
Vanguard
Dictating and Transcribing
Machine
$392.50
80-8,500
cycles (±3 db)
at 7 Vj" /see.
80-5,000
cycles (±3 db)
at3'/4"/sec.
Data
Manufacturer
Two independent channels on standard Ya" tape; each
channel with independent recording — playback facility;
simultaneous recording on channel 1 and playback of
channel 2; simultaneous playback of channel 1 and chan-
nel 2; simultaneous (binaural) recording on channel 1 and
channel 2; facilities for listening optionally to channel 1 or
channel 2 or to both channels. Loudspeaker or head-phone
listening; two speeds (either 3J4 an d 1Yl or 1% and
3% inches per second); push-button operation of record,
listen, fast forward, fast reverse, and stop. Twin neon
recording level indicators. Weight, 30 lb.; 110-120 Volts.
60 cycles; 100 Watts.
Provide combined use of magnetic discs, magnetic tape
and phonograph records. Data on request.
Portable dual-track, two speed recorder with 5 watts power
output. Push button for instant speed change with auto-
matic equalization. Separate take-up and drive motors.
Flutter and wow, 0.3%. Monitoring switch for head-
phone, internal or external speaker. Inputs for micro-
phone and radio-phono. Outputs for external amplifier,
speaker or telephone line. Motor switch separate from
amplifier. Weight: 40 lb. without radio — 43 lb. with radio
Records from radio to tape without external connections
50-12,000
cycles (±3 db)
at 7'/j"/sec.
50-7,000
cycles (±3 db)
at 3 Vt "/sec.
65-10,000
cycles at
7'/2"/l«C
200-5,000
cycles (±5 db)
at 1 7 /s" sec.
80-8,000
cycles
Portable two-speed, dual track recorder with single shift-
knob control of all functions. Signal-to-noise, over 45 db.
Wow, less than 0.3%. Power output, 5 watts. Includes
standby and monitor switch, two neon recording level
indicators, safety record-lock button, 5" x 7" oval speaker,
ceramic microphone and patch cord. Inputs for micro-
phone and radio-phono. Outputs for external speaker and
external amplifier. Weight, 23 lb.
Portable, dual-track recorder with tape speeds of lYl"
and 3%" per second. Fast forward and rewind, 90 sec-
onds for 1200 ft. reel. Bias-erase frequency, 50 kc. Power
output, 2 watts undistorted, 3 watts maximum. Built-in
6" speaker. Inputs for microphone and radio-phono. Out-
puts for external speaker and external amplifier or moni-
tor. Neon recording level indicator. Recording time
indicator. Ceramic microphone included. Weight, 22Yl lb.
Portable, dual-track recorder. Self-contained battery power
supplv. Battery life 45 hours. Battery life indicator light.
Cartridge-loaded (Yi hour to a side.) Rewind, manual,
two minutes for Yl hour recording. 3 controls: On-Off,
Plav-Record. and Volume. Wow and flutter, less than
0.7%. Signal-to-noise ratio, 42 db. One microphone input,
high impedance (1 mv min.). Output for earphone or ex-
ternal amplifier. Tape, Ya" '. "Mylar" base. Supplied with
micorhone earphone, batteries, and tape. Accessories
available. Size: 8'/ 2 " x ^Vi" x ty&"- Weight, 3 lb.
Magnetic sheet size 8'/j" x 11", 10 minutes dictation time.
Complete combination model including conference re-
cording, telephone recording, foot control start-stop and
backspace, earset, microphone with or without playback
speaker. The only machine on which an automatic copy
of the dictation can be made simply by inserting two
sheets at one time. Sheets are erasable and reusable indefi-
nitely. May be folded and mailed or filed away. Equipped
with 5" PM speaker.
THE
PENTRON
CORPORATION
777 South Tripp
Avenue,
Chicago 24,
PREMIER
ELECTRONIC
LABORATORIES
382 Lafayette St.
New York 3,
N. Y.
Model and Price
Pentron
"Clipper"
Model RWN
$129.50
Pentron
'Pacemaker"
Model T-90
$189.50
Pentron "Emperor"
Model HF-400
$249.50
Model
MP-2
basic
recorder
with
preamp.
$174.50
Pentron
Tape Player
Model PB-A2
$119.50
Pentron
"Dynacord"
Model DTM
Tape Mechanism
$395.00
Model DS-10
Preamplifier
$90.00
Tape Mechanism Case, $40.00
Amplifier Case, $25.00
Frequency
Response
50-9,000
cycles at
7'/j"/see.
50-5,000
cycles at
3 3 i",'see.
50-10,500
cycles at
7 1 2" sec.
50-5,000
cycles at
3 3 / 4 "/see.
40-12,000 cycles
at 7' 2" sec.
40-6,000 cycles
at3 3 4" sec.
50-12,000
cycles (±3 db)
at 7' 1" sec.
50-8,000
cycles at
7Vi"/sec.
50-5,000
cycles at
3 5 /4"/sec.
"Tapesonic"
Model 70-B
$368.50
40-15,000
cycles (±2 db)
at 15"/sec.
40-10,000
cycles (±2 db)
at 7 Vi "/see.
40-16,000
cycles (±3 db)
at 15" sec.
40-13,000
cycles (±3 db)
■t7'/i"/i«e.
Data
Portable two speed, dual-track recorder with Monomatic
single slide-knob control for tape speed, record, play,
fast forward and rewind. Signal-to-noise, 42 db. Flutter,
under 0.5% at 71/^'Vsec. Power output, 4 watts. Neon
bulb recording level indicator. Inputs for microphone
and radio-phono. Outputs for auxiliary speaker and
amplifier. Microphone included. Also available with single
track heads. Weight, 23 lb.
Portable dual-track, two speed recorder with Unimagic
single-lever control for play, record, fast forward and
rewind. One knob speed change. Signal-to-noise, 50 db.
Flutter, less than 0.3% at 7i/ 2 " per sec. Fast forward and
rewind, 70 seconds for 1200 ft. Power output 5 watts.
Electronic eye recording level indicator. Two Alnico V
speakers, 1 woofer and 1 tweeter. Automatic index
counter. Inputs for microphone and radio-phono. Outputs
for external speaker or amplifier. Weight, 27 lb.
Mechanically similar to Model T-90. Has illuminated VU
meter and three-speaker sound system with two 6" woof-
ers and separate 4" "roving" tweeter. LC crossover net-
work at 1000 cycles. Power output, 10 watts push-pull
Weight, 3 3 lb.
Basic tape mechanism and preamp in portable case, de-
signed for use in hi-fi systems. Tape mechanism has "Uni-
magic" single lever control, dual track heads with re-
movable pole pieces. Push-pull speed change. Preamplifier
provides record-erase bias and necessary audio output to
feed amplifier of hi-fi system. VU meter for recording
level. Equalization switch for tape speed. Signal-to-noise,
47 db. Inputs for microphone, radio-phono. Components
available separately for custom installation.
Portable magnetic tape reproducer, for playback only of
any standard J4" tape recorded with dual track at 7'/ 2 "
or iy 4 " per second (single-track heads available at slightly
higher cost). Flutter less than 0.5%. Fast forward and
rewind speed, 20 to 1.
Complete with amplifier and speaker. Weight, 22 lb.
Professional type, dual-speed recorder for rack or portable
mounting. Standard speed, IY2" and 15"/sec. Also avail-
able for iy 4 " and 7'/ 2 " speeds. Signal-to- noise, over 55 db
Flutter and wow, under 0.2% at 15"/sec. Starting and
stopping time, 0.1 second at 15"/sec. Playback timing
accuracy, ± 0.2%. Rewind time, less than 60 sec. for
2400 ft. reel. Three separate heads. High inertia, direct
capstan drive. Dynamic braking. Push-button controls
with automatic cycling for record, fast traverse, play and
stop. Erase interlock, automatic stop and instantaneous
stop bar. Monitors from input or from tape while re-
cording.
Portable professional type dual track unit with 4'/ 2 " VU
meter. Three separate heads, permitting instantaneous
monitoring from tape while recording. A.B. switch per-
mits comparison between original and recorded program.
Push button operation using seven relays and one solenoid
Three speeds. Flutter and wow, 0.1% at 15"/sec: 0.2%
at 7J/ 2 "A e c.: 0.3% at 3^"/sec. Mixing channels for
mike, radio or phono inputs. Three heavy duty dynami-
cally balanced motors. Fa=t forward and rewind, less tha"
one Min. for W/2" r ^\. Electro dynamic brake action and
tape tension. DC. on preamp heaters. Push-pull 1 2 watt'
audio output.
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