Audio Devices - Tape Recorder Directories 1955-1961

HIGH SCHOOLS • JUNIOR HIGH SCHOOLS • COLLEGES • UNIVERSITIES

Plan NOW to participate in Audio Devices

$16,000

educational awards

72 awards totaling over $16,000 worth of Sound
Recording Equipment and tape or discs will be
donated by Audio Devices, Inc.

Here's a once-in-a-lifetime opportunity
for any high school or college that
wishes to expand its recording facilities or
to start a new sound recording program.
First award, in each of two classifications,
will be 52,000 worth of tape or disc re-
cording equipment, plus S500 worth of
tape and/or discs, plus a bonus of S250
worth of tape or discs for Distributor en-
dorsement of entry blank. These and 70
other valuable equipment and tape or disc
awards will be donated by Audio Devices,
Inc., to the schools which, in the opinion

of qualified judges, plan to make the most
effective and beneficial use of the record-
ing facilities offered. You can select your
own recording equipment, as well as the
types of Audiotape or Audiodiscs that
best meet your requirements. There's
nothing to buy — no strings attached.

For complete details and official entry
blank, see your Audiotape Distributor . . .
or write to Audio Devices, Inc., Educa-
tional Dept. , 444 Madison Avenue,
New York 22, N. Y

HERE'S THE BOOK YOUVE BEEN WAITING FOR
how fo make good tape recordings

THE COMPLETE HANDBOOK OF TAPE RECORDING

by C. J. LeBel, Vice President, Audio Devices, Inc.

This completely new handbook of tape recording
contains up-to-the-minute information of interest
and real practical value to every tape recordist.
Profusely illustrated with photographs, charts and
diagrams prepared especially for this book, it con-
tains 150 pages of valuable information on all phases
of modern tape recording. The author. Mr. C. J.
LeBel, is one of the country's foremost authorities
on sound recording.
"How to Make Good Tape Recordings" can be

read and easily understood from cover to cover by
even the most inexperienced of home recordists. Yet
it contains such a wealth of practical information
that it will be a valuable aid to professional tape
recordists as well.

Available in deluxe cloth-bound edition at $2.50.
or economy paper-bound edition at $1.50. Get a
copy from your Audiotape distributor or send check
or money order direct to Audio Devices. Inc.. Dept.

, 444 Madison Avenue. New York 22, N. Y.

C
-»

"M

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u
■r.

record

Published by

AUDIO DEVICES, INC.

444 MADISON AVENUE, N. Y. 22, N. Y.

audiofilm

cuuiiopW*

AUDIO DEVICES, Inc.

444 MADISON AVENUE, NEW YORK 22, N. Y

IN HOLLYWOOD: 1006 N. Fairfax Ave. IN CHICAGO: 6571 N. Olmsted Ave.

Export Dept.: 13 East 40th St., New York 16, N.Y, Cables "ARLAB"

AUDIO RECORD

Sept. -Oct., 1956

19

QUICK FACTS ON MAGNETIC TAPE RECORDERS

(Additional Information can be obtained by writing to the manufacturer)

Manufacturer

AMPEX

ELECTRIC

CORPORATION

934 Charter St.,
Redwood City,
California

AMPLIFIER
CORPORATION
OF AMERICA

398 Broadway
New York 13,
N. Y.

Model and Price

A 122 Portable
A 112 Portable

A-SERIES
Player-Recorders

STEREOPHONIC
A 121 Consolette

$495. 00
A 122 Portable

$449.50

MONAURAL

AIM Consolette

$439.50

A 112 Portable

$395.00

A621 Amplifier Spkr. (Console) $229.50
A692 Amplifier Spkr. (Portable) $199.50

CONSOLE MUSIC SYSTEMS
A423 $1470 A323 $1070

Frequency
Response

At 7Vj"/sec.

30-15,000
cycles

-2 db. 50-
10,000 cycles

At 3% "/see.

30-7,500

cycles

2 db 50-

5,000 cycles

(as above)

Data

Two-speed units with half-track heads for dual-track
recording and monaural or stereophonic playback (in-line
heads) through separate amplifier-speakers. Half-track
erase heads. Signal-to-noise, better than 50 db below
peak record level at 7J/2"/sec and 40 db at 3%"/sec.
Flutter and wow, under 0.25% at 7J/ 2 "/sec, 0.3 at
3 J4 "/sec. Rewind time, less than 90 sec. for 1200 ft.
Inputs: high impedance line 0.75V rms for program
level; high impedance microphone. Playback output
greater than 0.75 rms into high impedance load. Port-
able units weigh 3 5 lb. Consolettes in blond or mahog-
any finish.

Ten watts output with noise 70 db below rated output.
Response essentially flat from 65 to 10,000 cycles. Con-
trols for volume, equalization, selector for tape, TV,
tuner or phono.

Model 601

Portable

Tape Recorder

$545.00

Model S-5290

2-Track Stereophonic

Portable $995.00

Model 300-C

Console
Tape Recorder

$2046.00

Model 350-C

Console
Tape Recorder

$1315.00

Other Equipment:

VU "Magnemite"

Model

Speed
in/sec.

610-AV

l5 /u

610-BV

1%

610-CV

3%

610-TV

7V 2

610-DV

7'/j

610-EV

15

Price

$365
315
345

365
385
425

40-15,000
cycles ( ±4 db)

at 7 V," sec.
(±2 db 40 to
10,000 cycles)

(=2 db 50 to
10,000 cycles)

30-15,000

cycles (=2 db)

at 15" sec.

40-15,000

cycles ( — 4 db)

at 7y 2 "/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 1/ 2 "/sec.

50-7,500

cycles ( ±2 db)

at 3% "/sec.

300- 2,500 cps

100- 3,000 cps

50- 5,000 cps

50- 7,500 cps
50- 7,500 cps
50- 15,000 cps

A423 console includes A121 stereophonic recorder, AM-
FM radio, 3-speed record player and two amplifier-
speaker systems for stereo tape playback. A323 includes
A121 stereophonic recorder and amplifier-speaker systems
only.

Portable, professional-type single-track or dual-track
recorder with lYl" 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, phone jack for monitor-
ing input or tape while recording. 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.

Professional-type, single-track, dual-speed recorder oper-
ating at 15" and 7Vi" P er 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 V/i" and 15" or 3^4" and V/ z ". 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.

Two and three channel recorders for stereophonic or
binaural sound recording and parallel recording. Portable
or rack mounting. Information on request.

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, 6J/2" x 9'/^"
x 14". Weight, approx. 19 lb.

MISCELLANEOUS AUDIOTAPE ITEMS

Item

Type No.

Description

List Price

3PB

3" Plastic Reel in Box

$.25

EMPTY AUDIOTAPE REELS

4PB

4" Plastic Reel in Box

.45

IN INDIVIDUAL BOXES

5PB

5" Plastic Reel in Box

.60

7PB

7" Plastic Reel in Box

.75

Standard
Reels

10RB

10V Aluminum Reel in Box

4.00

^^

10FS

10' 2" Fiberglass RETMA in Box

4.00

y^5^2""^f

14RB

14" Aluminum Reel in Box

7.40

mtm

10H

NARTB Metal Hub

.70

>^SS&- S

5PBR
5PBY

Red

«n MS

Colored

5PBG

— r 5 Plastic Reel in Box
Green

.60

^2* ~~^

Plastic
Reels

5PBB

Blue J

7PBR

Red

7PBY

7PBG

_ > 7" Plastic Reel In Box
Green

.75

7PBB

Blue

EMPTY AUDIOTAPE BOXES

3B

For 3" Reel

.15

4B

For 4" Reel

.20

^fcrfr .^^^^~

5B

For 5" Reel

.20

^^Q

7B

For 7" Reel

.20

103

For IOV2" Reel

.75

14B

For 14" Reel

1.00

CORRUGATED MAILING BOXES
Strong, re-usable containers

5M

7M

10M

For 5" Reels
For 7" Reels
For 1014" Reels

.15
.20
.30

RECORDING HEAD CLEANER

Superior to carbon tetrachloride

1HC

One oz. Bottle with Brush

.65

AUDIO SELF-TIMING LEADER TYPE

^^^^T 4flh^^^fe A strong, durable leader tape of

^B- white "Mylar" material with spaced

^t**^>T~"^rTr markings to permit accurate rate

■ J0r timing of leader intervals.

3L

100 ft., V wide, Individually Boxed

.55

ADHESIVE REEL LABELS

Provide positive identification of
your tapes, right on the reel. Sim-
ply press to apply, pull off to
remove.

30AL

Envelope of 30, 2" x 2W labels

AUDIO HEAD DEMAGNETIZER

20

Removes all permanent magnetism
from recording and reproducing
heads in a matter of seconds.

AUDIO HEAD ALIGNING TAPE

Pre-recorded at 2,000, 10,000 and 15,000 cps (15"/ sec.) with
precisely correct head alignment. Individually boxed, with
instructions. . . .

200

300 ft. on 5" reel, individually
boxed, with instructions . . .

10.00

■i -*^a?! W how to make

GOOD TAPE RECORDINGS

This completely new handbook of tape
recording contains up-to-the-minute in-

25C

Deluxe cloth-bound edition

2.50

formation of interest and real practical
value to every tape recordist. Profusely
illustrated with photographs, charts and
diagrams prepared especially for this
book, it contains 150 pages of valu-
i able information on all phases of mod-
ern tape recording.

15P

Paper-bound edition

1.50

Hi

AUDIO RECORD

Sept.-Oct., 1956

The COMPLETE LINE of professional quality

CLUCuOTCU3l£ *"<*/ v- -^ /<»■ n^l

TIAOI MAIM

Manufacturer

Model and Price

••

Description

Type No.*

Length

Reel

PLASTIC-BASE AUDIOTAPE

on I'/j-mil cellulose acetate

(in the Red Box)

Meets the most exacting requirements of the pro-
fessional, educational and home recordist at
minimum cost. Known the world over for its
matchless performance and consistent uniform
quality. Series 51.

151
351
651

1251

255 1H

255 1R

J2551FS

505 1H
505 1R

COLORED PLASTIC-BASE AUDIOTAPE

on l'/j-mil cellulose acetate

(in same box as above

with label for color)

Green and blue colored Audiotape, in con-
junction with the standard red-brown tape,
provide instant visual identification of recorded
selections 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

151G
351G
651G

1251G

255 1HG

255 1RG

J2551FSG

5051 HG
505 1RG

151B
351 B
651B

1251B

2551HB

2551 RB

12551 FSB

5051HB
5051 RB

150 ft.
300 ft.
600 ft.

1200 ft.

2500 ft.
2500 ft.
2500 ft.

5000 ft.
5000 ft.

150 ft.
300 ft.
600 ft.

1200 ft.

2500 ft.
2500 ft.
2500 ft.

5000 ft.
5000 ft.

3" Plastic
4" Plastic
5" Plastic

7" Plastic

NARTB Hub

IOV2" Aluminum Reel

10'/2" Fiberglass (RETMA)

NARTB Hub

14" Aluminum Reel

"LR" LONGER-RECORDING AUDIOTAPE

on 1-mil Mylar' polyester film

(in the Black and Red Box)

50% 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.

°DuPont Trade Mark

261

961

1861

366 1H
366 1R
J3661FS

7261 H
726 1R

225 ft.

900 ft.

1800 ft.

3600 ft.
3600 ft.
3600 ft.

7200 ft.
7200 ft.

3" Plastic
4" Plastic
5" Plastic

7" Plastic

NARTB Hub

IOV2" Aluminum Reel

IOV2" Fiberglass (RETMA)

NARTB Hub

14" Aluminum Reel

n Self-Mailer

3" Plastic

Pkg

5" Plastic

7" Plastic

NARTB Hub

IOV2" Aluminum Reel

IOV2" Fiberglass (RETMA)

NARTB Hub

14" Aluminum Reel

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, afford-
ing maximum economy for applications where
high strength is not required. Series 41.

941
1841

3641 H
3641 R
364 1FS

7241 H
724 1R

AUDIOTAPE ON l'/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.

671
1271

2571 H

2571 R

12571 FS

5071 H
507 1R

SUPER-THIN AUDIOTAPE
on l/ a -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
excessive. Series 31.

1231
2431

900 ft.
1800 ft.

3600 ft.
3600 ft.
3600 ft.

7200 ft.
7200 ft.

600 ft.
1200 ft.

2500 ft.
2500 ft.
2500 ft.

5000 ft.
5000 ft.

1200 ft.
2400 ft.

5" Plastic
7" Plastic

NARTB Hub

IOV2" Aluminum Reel

IOV2" Fiberglass (RETMA)

NARTB Hub

14" Aluminum Reel

5" Plastic
7" Plastic

NARTB Hub

IOV2" Aluminum Reel

10'/2" Fiberglass (RETMA)

NARTB Hub

14" Aluminum Reel

5" Plastic
7" Plastic

List Price
Each

$ 0.70
1.35
2.25

3.50

8.50
10.90
10.90

17.00
22.10

70
1.35
2.25

3.50

8.50
10.90
10.90

17.00
22.10

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

4.25
7.00

12.75
15.15
15.15

30.30
36.30

5.00
9.25

k 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 "1" to "0". E.g.
Audictape 1250 covers 1200 ft. reel of plastic base tape wound with Oxide Out.
COLORED PLASTIC REELS. Audiotape on 5" and 7" plastic reels can be
supplied on colored reels at 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) add letters "RR" and "YR", "GR" or "BR" to Type No. Listed.
E.g.— Type 1251YR covers 1200 feet of standard plastic-base tape on Yellow
Reel. Type 1251GBR covers 1200 feet of Green plastic-base tape on Blue Reel.
; "FS" in Type No. indicate Fiberglass reel with solid hub and 5/16" center hole.

AMPLIFIER
CORPORATION
OF AMERICA

398 Broadway
New York 13,
N. Y.

(other models
available)

AMPRO
CORPORATION

2835 North
Western Ave.
Chicago 18, III.
For information
write to
GRAFLEX, INC.
154 Clarissa St.
Rochester 8, N. Y.

AUDIOMATION
LABORATORIES

7230 Clinton Rd.
Upper Darby 23,
Pa.

Model

Magnemite" Portables

610-A

610-B

610-C

610-TD

610-SD

610-E

6 10- DM

610-EM

Speed
in/ sec.

I5 /| 4

1%

33/ 4

7'A
15

5 /i4-7y,

1%-15

Price

$275
225
255
275
295
335
355
395

Weathertite
"Magnemites"

(Add $30 to price
of Std. Units)

"Flyweight
Magnemite"
3 10- A
310-B
310-C
310-TD
310-SD
310-E

"Secret
Recorder"

210-B

210-BC

l5 /l.

1 7 /8
3%
7'/2

7Vi
15

1'/.

1 7 '8
3>/4

340
290
320
340
360
400

349

369

"Stereo-Magnemite

"Hi-Fi Two Speed"
Model 757 $249.95
Model 757T $284.45

CONCERTCASTER

Continuous Tape
Player

Without Pwr. Amp.
$835.00

With 10W Pwr. Amp.
$905

With 25W Pwr. Amp.
$935

Frequency
Response

300- 2,500 cps
100- 3,000 cps
50- 5,000 cps
50- 7,500 cps
50- 7,500 cps
50-15,000 cps

as above

as above

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

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
50-15,000 cps

100- 3,000 cps
50- 7,500 cps
50-15,000 cps

40-12,500
cycles at
7'/, "/sec.

40-6,000
cycles at
33/4" sec.

40-8,000
Cycles at

3 3/4 "/see.

40-15,000
Cycles at

7Vj"/sec.

Data

Completely self-contained, battery-operated portables
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. Op-
tional 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.

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 corrosion.

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, 5I/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.

Designed to record and play back any messages, musi-
cal programs or sounc effects up to 60 min. in length
on cartridge-loaded endless loop of std. !4" tape.
Automatic erase. Push-button start and stop, switch
or relay remote control. Electronic-eye recording
level indicator. Microphone and bridging inputs. Out-
put impedance, 600 ohms. Output level, +6VU.
Headphone monitoring. Standard rack panel mount-
ing or custom rack cabinet. Size, 19" x 8J4" x 9]/i" .
Weight, 24 lb.

Portable, stereophonic battery-operated spring-motor
recorder. Mechanically similar to 610 series. Two
separate channels for stereophonic recording. Inde-
pendent gain for each channel. Can be monitored
with binaural headphones while recording. Optional
P.M. erase. Playback through earphones or external
amplifiers and speakers. Input impedance, ^Megohm.
Output impedance, 50,000 ohms. Size, SYz" x 11" x
10". Weight, 17 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.

Heavy-duty console type tape phonograph for provid-
ing up to 8 hours of unattended, background music
without repetition. Two speeds. Automatic reversal
and shut-off with unmodified tape. Automatic, con-
tinuous re-cycling or shut-off controlled by switch on
panel. Simple controls, light tape tension. Easy and
precise head alignment. Signal-to-noise, better than 50
db at 7l/2"/sec. Hysteresis synchronous capstan motor
and two 4-pole torque motors. Max. reel size, 14".

.41 DIO RECORD

Sept.-Oct., 1956

17

Manufacturer

AUDIOMATION
LABORATORIES

7230 Clinton Rd.
Upper Darby 23,
Pa.

BELL &

HOWELL

COMPANY

7100McCormickRd.
Chicago 45, III.

BELL SOUND
SYSTEMS, Inc.

Columbus 7,
Ohio

Model and Price

FIDELIVOX

Continuous Tape

Player

With single-ended,

unbalanced Preamp.

$730.00

With push-pull,

balanced Preamp.

$755.00

VaryTape System

With push-pull line

Amp. plus 8 VU,

balanced

$1,750.00

Bell & Howell
Miracle 2000

Model 300-MI

Mahogany

$299.50

Model 300-BI

Blond Oak

$314.50

TDC

'Stereotone"

Portable

$249.50

Model RT-75

Three-Speed

Recorder

$164.95

Model RT-88

Two-Speed

Recorder

$139.95

Frequency
Response

40-8,000
cycles at

3% "/set.

40-15,000
cycles at

7 '//'/sec.

as above

50-10,000

cycles |*2 db)

at 7'/ 2 "/sec.

50-6,500
cycles (±3 db)

at 3% "/sec.

50-10,000
cycles ( =2 db)

at 7Vj"/sec.

50-8,000
cycles (=3 db)

at 3 3/ 4 "/sec.

30-12,000
cycles at

7i/j"/sec.

30-7,500
cycles at

3 % "/sec.

50-4,500
cycles at
1 Vb"/soc

Data

Manufacturer

Heavy-duty rack-type tape phonograph for providing up
to 8 hours of unattended, background music without
repetition. Mounts in 31 J/2" 0I space in standard 19"
rack. Mechanical and electrical data similar to Concert-
caster model, shown on Page 3.

50-10,000
cycles at

7V s "/sec.

Consists of two identical Fidelivox automatic 8-hour
tape-handling mechanisms arranged for unlimited varia-
tion of program continuity by the automatic inter-mixture
of the music content ot 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 and infinitely adjustable.

Manual turnover dual-track recorder with tape speeds
of 7J/2" and 3^4" per second. Four speakers: two
8" wooters on opposite sides of case and two electro-
static tweeters behind front grill. Three separate motors
with electro-magnetic instant braking. Interlocking push-
button controls for stop, forward, rewind, play, speaker
and record (with safety lock). Automatic tape shut off.
Program indicator with manual reset. Fast forward and
rewind, 1200 feet in 40 seconds. Wow and flutter below
0.2% at 7^"/sec. Delivers over 8 watts audio. Signal-
to-noise, better than 40 db. Distortion less than 3% at
4 watts. Speaker selector switch. Output jacks for ex-
ternal amplifier and speaker. Two neon record level
lamps. Illuminated %'olume and tone controls. Prices in-
clude controlled reluctance microphone, power cord,
radio-phono patch cord and 7" reel.

Two speed, manual turnover dual-track recorder. Vertical
design with 10 inch extended range speaker. Tape speeds
of 7I/2" and 33-4" per second. 7" maximum reel size.
Three separate motors with electro-magnetic instant brak-
ing. Interlocking push button controls for stop, forward,
rewind, play, speaker and record (with safety lock).
Automatic tape shut off. Program indicator. Fast forward
and rewind, 1200 feet in 40 seconds. Wow and flutter
below 0.2% at 7 J/J" per second. Delivers over 8 watts
audio. Signal-to-noise, better than 36 db. Distortion, less
than 3% at 4 watts. Output jacks for external amplifier
and extension speaker. Two neon record level lamps.
Illuminated volume and tone controls. May be used as
public address system. Prices include controlled reluct-
ance microphone, power cord, radio-phono patch cord
and 7" reel.

Portable dual-track recorder with single-lever speed selec-
tor for 71/2", 3J4" ° r 1%" P" 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,
3 5 lb.

Dual-track recorder with tape speeds of 7 '/J" and 3 ^4"
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.

WEBSTER
ELECTRIC
CO.

Racine,
Wisconsin

Model and Price

"Ekotape"

Portable

Model 260

$225.00

Model 375
$99.95

Model 620

(Special 375)

$109.95

"Recordio'

Model 750
$99.95

Model 621

(Special 750)

$109.95

WILCOX-GAY
CORPORATION

Charlotte,
Michigan

The Jet

Model CL622

Cartridge

Loader

$129.95

The Master

Model 642

(2 speakers)

$149.95

The Deulxe

Model 651

(3 speakers)

$189.95

The Convertible

Model 674

(5 speakers)

$229.95

The Imperial

Model 686

(6 speakers)

$269.95

The Coronet
Model 785
(7 speakers,
clock radio)
$329.95

Tape-Disc Recordio
Model 4C-10 $199.95

Frequency
Response

40-7,000
cycles at

7i/j"/sec.

40-4,000
cycles at

3% "/sec.

85-7,000
cycles at

at % "/sec.

85-8,000
cycles at

7'/j"/sec.

65-9,000

cycles at

at 3%"/ sec.

80-8, 50C
cycles at

7'/, "/sec.

65-10,000
cycles at

7'/j"/sec.

65-12,500
cycles at

71/1 "/sec.

65-15,000
cycles at

7'/ 2 "/sec.

80-6,000 cycles
at 3%"/sec.

Data

Portable, two-speed, dual-track recorder similar to Model
250 on Page 16 except as follows. Signal-to-noise, 35 db.
Neon glow tube recording level indicator. Output jack
for external speaker. Power output, 2J/2 watts at 5%
distortion. Weight, 29 lb.

Portable, single speed, dual-track recorders with "Prest-
Omatic" push-button keyboard. Signal-to-noise, 3 5 db.
minimum. Wow and flutter: 0.5% at 3J4"/sec, 0.35%
at 7'/2"/sec. Neon normal and overload recording level
indicators. Record lock button prevents accidental erase.
Fast forward and rewind, less than V/a, min. for 1200 ft.
Amplifier, 3 watts output. Input for radio-phono-TV.
Output for earphone monitoring or external speaker.
Includes 4" round speaker and crystal microphone.
Weight, 26 lb. "Special" models same as above, but in
deluxe tu-tone case.

Portable, dual-track recorder with ly^'/sec. tape speed
and cartridge tape loading. Signal-to-noise, 3 5 db mini-
mum. Wow and flutter, 0.5%. "Magic Eye" recording
level indicator. Record lock button. Amplifier, 3 watts
output. Output for earphone monitoring or external
speaker. Includes 4" x 6" speaker, microphone, and
cartridge of pre-recorded tape. Weight 22 lb.

Portable, two-speed, dual -track recorders with tape speeds
of 75/2" and 3}<j"/sec. by switch control. Signal-to-noise,
35 db minimum. Wow a.id llutter: 0.3% at H/i'/sec,
0.5% at 3%"/sec. Neon normal and overload recording
level indicators. Other recorder features same as for
Models 375 and 750 above. Model 642 has one 5" x 7"
elliptical and one 4" round speaker. Weight 33 lb.
Model 651 has tape timer and one 6" x 9" elliptical,
one 4" round speaker and one "tweeter". Weight, 35
lb. Model 674 has tape timer, 7 watt amplifier output
and 5 speakers — one 6" x 9", two 4" and two
"tweeters". Also three extension speaker jacks. Weight,
40 lb. Steel tube legs convert portable unit to chair-
side consolette.

Portable, two-speed, dual-track recorder with lYl" and
3%"/sec. tape speeds, visual tape timer, remote control
and six speakers — two 6" round, two 4" round and two
high frequency electrostatic "tweeters". Signal-to-noise,
3 5 db minimum. Wow and flutter: 0.2% at V/i"/sec,
0.38% at 3%"/sec. Amplifier output, 8 watts. Other
recorder features same as for Model 674 above. Weight,
47 lb. Model 785 same as Model 686, except with seven
speakers and built-in Telechron-timed 8-tube clock radio.
Speaker system includes two 6" round, two 4", two high-
frequency electrostatic "tweeters" plus one roving 12"
PA. type speaker in base with 25' extension cord.
Weight, 50 lb.

Portable combination tape and disc recording and repro-
ducing unit with 3%" 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 other net.

16

AUDIO RECORD

Sept.-Oct., 1956

Manufacturer

V-M
CORPORATION

Benton Harbor,
Michigan

J. c.

WARREN
CORPORATION

21 Hanse Ave.,
Freeporl,
N. Y.

WEBSTER-
CHICAGO
CORPORATION

5610

Bleomingdale Ave.,
Chicago 39,
III.

WEBSTER
ELECTRIC
CO.

Racine,
Wisconsin

Model and Price

"Celeste"

Stereo Playback

Table

Model 750

$259.95

777

Series

Battery

Portables

Tapo Model 777 (blue) $295.00

Traveler Model 771-1 (brown) 298.50
Tempo Model 777-2 (gray) 314.00

Privateer
Mark VIII
$379.00

Webcor
"Royal"

with

Radio

$229.95

without

Radio
$189.95

Webcor

"Royal

Coronet"

with

Radio

$279.95

without

Radio
$239.95

Model 252

"Ekotape"

Model 250

(Portable)

$269.50

Model 252

(Limed Oak)

$289.50

Model 254

(Mahogany)

$289.50

Frequency
Response

40-15,000

cycles ( -5 db)

at 7'/," sec.

to
«PS

at

3,500 - l 7 /s" sec.

6,000 - 3% "/sec.

12,000 - 7y 2 "/sec.

to 3,500
cycles at

l%"/sec.

50-10,000
cycles at

7y 2 '7*e«.

50-7,500
cycles at

3% "/'sec.

50-12,000
cycles at

7'/j"/sec.

50-8,000
cycles at

3% "/sec.

30-10,000
cycles at

7'/j"/see.

50-5,500
cycles at

3 y 4 "/sec.

Data

Manufacturer

Teams with any other amplifier-speaker for stereophonic
playback. Two-speed, dual-track monaural recorder with
3 speakers — two heavy-duty 8" woofers and a 3.5"
tweeter. Power output, 5 watts. 75 KC record bias and
power erase. Better than 45 db signal-to-noise ratio. Less
than 0.4% RMS flutter and wow. External amplifier and
speaker jacks, push-button controls, precision tape index
counter, "recording normal" light, "distort" light, auto-
matic shutofF, balanced tone control, monitor switch,
pause button, safety switch, 3 -way input receptacle and
storage compartment. Blonde or mahogany furniture-
finished cabinets. Optional legs convert it to consolette.

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 1 10 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".

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 input
level indicator, headset, external microphone, telephone
recording adaptor.

Portable, two speed, dual-track recorder with two record-
ing heads permitting track change without reel turnover.
Signal-to-noise, 50 db. Wow and flutter, less than 0.4%.
Electronic eye recording level indicator. Four-way master
control. Automatic shut-off at either end of tape. Speed-
ometer-type footage counter. Power output, 8 watts. 6"
wide range speaker. Output selector switch for normal
recording, monitoring or external amplifier. Inputs for
microphone, radio-phono, other tape recorder. Weight,
47 lb. Radio tuner (when furnished) is transistor type
with printed circuit.

All features same as "Royal" model, except in larger
case with three-speaker system consisting of two 6" and
one 4" speaker with total cone area of 65 sq. in.
Weight, 54 lb.

Two speed, dual-track recorders in portable and consol-
ette models. Signal-to-noise, 38 db. Wow, not over 0.3%
at 7'/2"/sec. or 0.5% at 3J4"/sec. Meter-type recording
level indicator with red sector to show excessive level.
Program selection finder. Central control for fast for-
ward, standard forward, rewind and stop. Fast forward
ratio, 15 to 1. Rewind ratio, 15 to 1 at 7'/2"/sec, 30
to 1 at 3%"/sec. Provision for foot, manual and elec-
tric controls. Two matched 5" speakers. Power output,
6 watts at 5% distortion. Inputs for microphone and
rario-phono. Outputs for external speaker and hi-fi sys-
tem. Weight, 3 3 lb. Consolette models have one 6" by
9" oval speaker and a 3" round "tweeter." Matched
bass reflex speaker available.

BELL SOUND
SYSTEMS, Inc.

Columbus 7,
Ohio

BERLANT-
CONCERTONE

Division of
American
Electronics, Inc.
655 W. Washing-
ton Blvd.,
Los Angeles 15,
Cal.

BROADCAST
EQUIPMENT
SPECIALTIES
CORP.

P.O. Box 149
Beacon, N. Y.

COLUMBIA
RECORDS, Inc.

799 Seventh
Avenue,
New York 19,
N. Y.

CRESCENT

INDUSTRIES,

INC.

5900 W.Touhy Ave.

Chicago 31,

III.

Model and Price

Cub-Corder

Model 2260

(7'/ 2 and 3 3 4" sec.)

Model 2261

(3 J /4 and l'/s'Vsee.)

$224.95

Frequency
Response

•2*X^r ••••

©!_

CONCERTONE CUSTOM

Models 21, 22, Rack-Mtd. Recorder $495.00

Model 23, Stereo Recorder 795.00

Models 24, 25, S-O-S Recorder 695.00

Model 26, Full /Half Track Recorder 795.00

BERLANT DELUXE

Models 31, 32, Rack-Mtd. Recorder 695.00

Model 33, Stereo Recorder 995.00

Models 34, 35, Delayed Broadcast Rec. 845.00

Model 36, Full/Half Track Recorder .... 995.00

BERLANT-AMERICAN

Models 91, 92, Ro-k-Mtd. Recorder 1295.00

Model 93, Stereo Recorder 1695.00

Models 94, 95, Delayed Broadcast Rec. 1445.00

Model 96, Full/Half Track Recorder 1695.00

Tapak
(tape-pack)

Duplex

Newscaster

$349.50

Triplex

Newscaster

$399.75

Simplex

Newscaster

$289.50

"Pocketape"

Battery Operated

Pocket Size

Unit

$289.50

(Available
Nov. 1956)

Columbia

Model 560

$139.95

Model TR 730
"TUTOR"

(33/ 4 "/sec.)
$89.95

Model TR 772

"CURATOR"

(two speed)

$139.95

200-6,000
cycles at

7y 2 "/sec.

40-15,000
cycles (=2 db)

at 15 "/sec.

50-13,000

cycles (=2 db)

at 71/j'Vsec.

50-5,000
cycles (±2 db)

at 3% "/sec.

Data

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-tt. reel of tape and take-up reel.
Weight, ny t lb.

100-9,000
cycles at

7Vj"/sec.

100-9,000
cycles at

7i/ 2 "/sec.

100-6,000
cycles at

71/, "/sec.

100-4,000
cycles

100-5,500
cycles at

7i/,"/sec.

50-8,500
cycles at

7 V, "/sec.

Complete line of broadcast and home hi-fi recorders for
portable, rack or custom mounting. All models have
following features: Two-speed direct drive motor and
two torque motors; 3 heads with provision for 2 more;
4I/2" UV meter; 2-channel input mixer; A-B test fader
and cueing/editing switch. Instant speed selection of
15"/sec and l]/z"/sec or 3%"/sec and 7|/2"/sec. Signal-
to-noise, 55 db by proposed NARTB 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 7J/2"/sec. Fast forward and rewind, less than 60 sec.
for 2500 ft. High impedance microphone input and un-
balanced bridging input. Output impedance, cathode fol-
lower, 600 ohms with plug-in transformer.
Berlant Deluxe Series features hysteresis synchronous
direct drive for maximum timing accuracy.
Berlant American Series features etched circuit construc-
tion of electronic assembly and hysteresis synchronous
direct drive.
Tape player units also available.

The spring-powered equivalent of conventional electric
tape recorders. Records, erases, monitors, rewinds at
high speed, plays back through built-in 4" x 6" loud-
speaker for room size audiences, or will feed an external
amplifier or public address system. Has new unitized
amplifier with transistorized AC bias oscillator for low
battery drain and extended frequency range. Speed l]/i"
per second (3^4" optional). Range: 55-58 db.

Same as Duplex Newscaster Model with the addition of
a miniature VU meter and provision to drive a 500 ohm
line. Can thus drive a line while the recorder function
stands by ready to record the material in case of line
failure. Speed lYl" P er second (3%" optional). Range:
55-58 db.

The standard attractively priced Tapak for broadcast
use. Records, rewinds at high speed, crystal microphone
doubles for playback, feeds external amplifier or phono
input of radio for loudspeaker reproduction. Recording
characteristics for NARTB on studio equipment or home
recorders. Speed IVi" per second (3^4" optional).
Range: 3 5-40 db.

Pocket-size, subminiature tape recorder. Records dual
track 1 hour total at 3%" per second or 2 hours at V/q,"
per second. Records, erases, monitors and plays back
through earphone or external amplifier. Interlocks pre-
vent accidental erase or "double exposure". Special 4"
reels transferable to any recorder. DC motor operated
from 15-hour mercury batteries. Dynamic range, 37 db.
Wristwatch mike available as optional accessory.

Portable, two-speed, dual-track recorder with two large
PM speakers and single master control for recording or
playback. Tape speeds, lYl" ana " 3%"/sec. Can be used
as PA system, with or without auxiliary speaker. Auto-
matic erase, fast forward and rewind speeds. One Brush
recording and playback head. Neon record-level indi-
cator. 4-watt amplifier. Includes high-impedance ceramic
microphone. Approx. shipping weight, 18'/4 lb.

Portable, dual-track recorder with 3%" tape speed. Auto-
matic 50 kc erase, fast forward and rewind, 3 -watt
amplifier and neon overload indicator. Signal-to-noise,
43-46 db. Speed control accuracy, ± 2%. Includes
ceramic microphone. Weight, 20 lb.

Portable, two-speed, dual-track recorder. Same features
as above plus two-speaker design, provision for start-stop
foot switch and torque braking. Mike and radio-phono
input. Output jack for external speaker or amplifier.
Wow and flutter less than 0.5%. Weight, 24 lb.

.41 DIO RECORD

Sept. -Oct., 1956

IS

Manufacturer

CRESCENT

INDUSTRIES,

INC.

5900 W.Touhy Ave

Chicago 31,

III.

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.

ELECTRONIC

TEACHING

LABORATORIES

1818 M Street
Northwest,
Washington 6,
D. C.

EMC

RECORDINGS

CORP.

806 E. 7th St.,
St. Paul 6,
Minn.

Model and Price

Model TR 773

'PROFESSIONAL'

(2-speaker)

$189.95

Model TR 774
"CHANCELLOR"

( 3 -speaker )
$239.95

De Jur

Dual

Professional

Model TK-820
$399.50

Model TMB-820

(basic recorder

for custom

installation)

$329.50

■""

"Tru-Fidelity"
Recorder

Model 11A200
$395.00

Educorder

Dual

Model M-6A

$295.00

,» »

.^-■S.** w

Educorder

Dual

Model M-7A

$320.00

Electro-Dual
MONITOR

Binaural
Portable

Model E-3

$297.00

EMC
'Communicator"

Portable

Playback

Unit

$129.95
(tentative)

Frequency
Response

70-13,000
cycles at

7 V, "/sec.

60-5,000
cycles at

3 % "/sec.

40-16,000
cycles (=2 db)

at 7i/j"/sec.

50-10,000

cycles ( =2 db)

at 3% "sec.

50-10,000
cycles ( = iy 2 db)

at 7V 2 "/sec.

50-7,500

cycles ( -I'/j db)

at 3% "/see.

70-7,500
cycles at

7'/ 2 "/sec.

70-5,000
cycles at

3 3/4 "/see.

70-8,000

cycles ( =3 db)

at 7i/j"/see.

70-5,000
cycles (^3 db)

at 3% "/see.

50-9,000
cycles (±3 db)

at 3 3/4 "/see.

60-12,000
cycles at
71/2 "/sec.

80-6,000
cycles at

3 3/4 "/see.

(Based on
NARTB Curve)

Data

Manufacturer

Portable, two-speed, dual track recorder with illuminated
VU meter recording level indicator, bignal-to-noise, 48-
51 db. Wow and flutter, less than 0.5%. 4-watt amplifier.
Rewind time, 80 sec. lor 1200 ft. Provision for foot
switch control. Simultaneous monitoring and recording,
edit control button, ultrasonic erase. Inputs for mike and
radio-phono; outputs tor external speaker and amplifier.
Includes wide-range, controlled reluctance microphone.
TR773 has two speakers; TR774, three speakers.
Weight, approx. 28 lb.

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, hour separate erase and
record-playback heads. Illuminated program selector.
Electronic eye recording level indicator. Signal-to-noise,
55 db. Flutter and wow, 0.1% at 7l/ 2 "/sec; 0.2% at
3J4"/sec. Harmonic distortion, 0.8% at full rated out-
put. Power output, 6 watts undistorted. Rewind ratio,
15 to 1. Inputs: 2 high impedance, 1 low impedance.
Outputs: 1 high impedance, 1 low impedance. Model
TK820 has five speakers: 2 electrostatic "tweeters", 2
P.M. mid-range speakers and 1 P.M. "woofer". Includes
wide-range, dynamic cardioid michophone with matching
line transformer. Shipping weight, 55 lb.

Portable, dual-track, dual-speed recorder with 7 '/J 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 copying. Inputs for microphone, phonograph, radio.
Electronic eye recording level indicator, automatic foot-
age counter and exclusive Room Balance Control.
Weight, 39 lb.

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 for high impedance mikes. Three output connec-
tions: Channel 1, Channel 2 and Dual for binaural
headphones. Includes headphones and microphone.
We.Vht. 30 lb.

Portable, two speed, two channel recorder, providing
same dual functions as Model M-6A above. Recorder
unit has push-button control for all functions. Fast for-
ward and rewind, 2 min. for 1200 ft. Nominal 4 watt
peak power from each channel, sufficient to drive dual
speakers or over 100 high impedance headphones from
each channel. Neon recording level indicator for each
channel. Four input connections, two for each channel:
radio-phono and high-impedance mike. Same outputs as
above. Includes headphones and microphone. Weight,
30 lb.

Dual parallel track professional language laboratory re-
corder. Unique "split" amplifier used to minimize con-
trols and simplify operation but preserving the two in-
dependent record/play channels. Signal-to-noise, 45 db,
separate heads with azimuth adjustment, volume level
meter, all components mounted Yg," aluminum panel.
Weight, 15 lb.

Portable, self-contained playback unit with single-lever
tape control. Wow and flutter, 0.25% at 7'/2"/sec.
Signal-to-noise, at least 47 db for 7J^"/sec, 42 db for
354"/sec. Positive braking minimizes possibility of spill-
ing tape. Capstan is ground to ± .0001" tolerance. Dual
track Maico Dynamu 8040 "Ultralinear" head (gap
width less than .00015"). Three-stage pre-amplifier plus
cathode follower and power output stage. Amplifier out-
put: from cathode follower up to 10 volts at 1500 ohms:
from enclosed speaker — 3.0 watts at less than 4%
harmonic distortion. Amplifier connections: external
speaker jack, cathode follower output, power cord re-
ceptacle. 5" round Alnico V speaker. Accommodates 7"
reel. Weight: 20 pounds.

TELECTRO-

SONIC

CORPORATION

35-18 37th St.,
Long Island City 1
N. Y.

VIKING OF
MINNEAPOLIS

6900 Aldrich
Ave. So.,

Minneapolis 20,
Minn.

Sales Office:

2207 Lyndale
Ave. So.,

Minneapolis 5,
Minn.

V-M
CORPORATION

Benton Harbor,
Michigan

Model and Price

Telectro-

tape
Custom

220

$99.50

(without case)

Telectro-tape Professional 1000
Two-Unit Portable
(Price on request)

Multi-Channel
Data Recorder

Model
TR- 150-5

(Price on request)

Viking

75 Series

Tape

Decks

FF75 Monaural Playback $59.95

FF75R Monaural Record Playback 67.45

FF75RM Mon. Rec. -Monitor-Playback 76.66

FF75B 2-Channel, Half-Track Heads,

Staggered 69.95

FF75SU Universal Stereo Playback

(in-line and staggered heads) 97.65

FF75SR Stereo (in-line head) plus

Monaural Erase-Record 107.50

tape-o-matic'
Portable

Model 710
$189.95

"tape-o-matic"

Stereo Playback

Portable

Model 711
$209.95

Frequency
Response

50-12,000
cycles (±3 db)

at 7 '/ 2 "/see.

30-15,000

cycles (±2 db)

at 15"/ see.

30-15,000

cycles ! - 4 db)

at 7'/2"/sec.

30-10,000

cycles (±2 db)

at7'/2"/sec.

200-20,000

cycles ( =3 db)

at 15 "/sec.

200-40,000

cycles ( =3 db)

at 30" sec.

100-80,000

cycles (±3 db)

at 60", sec.

40-14,000
cycles ( =2 db)

at 7 1/2 "see.

40-15,000

cycles ( ±5 db)

at 71/2" sec.

Data

Basic dual speed recorder (7^" and 3^4'Vsec.) 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 7J/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 1 5"/sec. Play-
back timing accuracy, better than 0.2%. Max. reel size,
IOV2". 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.

Multi-channel data recorder/reproducer, available in
models using up to 14 channels. Consists of 5 separate
units for 19" rack mounting. Record, erase and repro-
duce heads in one plug-in assembly for one and two
channel units. Multi-channel units do not have erase
heads. Signal-to-noise, 55 db below tape saturation level.
Flutter and wow, under 0.1% rms. Three speed hyster-
esis synchronous motor drive. Rewind time, 1 min. for
2400 ft. Push-button controls for all functions. Monitors
from tape while recording. Harmonic distortion, 1% rms
at normal level. Input, 100,000 ohms unbalanced. Out-
put, 600 ohms unbalanced. Height, in rack, 52". Weight,
320 lb.

Tape Playback and Record-Playback units for custom
installation in hi-fi systems. Tape speed, H/i'/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 PB60 playback preamplifier — $24.50.

Viking RP61 record-playback preamplifier — $74.50.

Matched Viking RP61-S Stereophonic "Slave Record/-
Playback Preamplifier — $74.50.

Viking "PRO": Consists of FF75R-LP Deck (Monaural
Record/Playback) and RP61 Record/Playback Preampli-
fier installed in D396 Portable Carrying Case. Total
weight 23 lb.— $174.50.

D390 Portable Carrying Case for any FF75 Series Deck
and one or two PB60's. Weight of case and FF75 deck
18 lb. Case only $19.95.

Records and plays back monaurally. Convertible to stere-
ophonic playback. Two speeds, dual tracks, two speakers.
External amplifier jack, two-way external speaker jack.
Power output, 5 watts. 75 KC record bias and power
erase. Better than 45 db signal-to-noise ratio. Less than
0.4% RMS flutter and wow. Push-button controls, pre-
cision tape index counter, "recording normal" light,
"distort" light, automatic shutoff, balanced tone control,
monitor switch, pause button, safety switch, 3-way input
receptacle and storage compartment.

Portable, two-speed, dual-track recorder equipped to
team with any other amplifier-speaker for stereophonic
playback. Power output, 5 watts. Less than 0.4% RMS
flutter and wow. 75 KC record bias and power erase,
better than 45 db signal-to-noise ratio. Two speakers . . .
6" x 9" woofer and 3.5" tweeter. Other features same
as for Model 710 above.

I i

AUDIO RECORD

Sept.-Oct., 1956

Manufacturer

REVERE

CAMERA

COMPANY

230 East 21st Sf.
Chicago 16,
III.

SOUND-
SCRIBER
CORPORATION

146 Munson St.,
New Haven 9,
Conn.

THE

STANCIL-
HOFFMAN
CORP.

921 North
Highland Ave.,
Hollywood 38,
Cal.

TANDBERG

10 East 52nd St.,
New York 22,
N. Y.

TELECTRO-

SONIC

CORPORATION

35-18 37th St.,
Long Island City 1,
N. Y.

Model and Price

SoundScriber 24-hour (2 V? " min.)
recorder reproducer Model S-124 $650
SoundScriber 12-hour ( 3 % "/min. )
recorder reproducer Model F-112 $650

Frequency
Response

40-16,000

cycles (±3 db)

at 7>/2"/sec.

ample for

voice

communication

Model S6

Synchronous

Magnetic

Film
Recorder

$1,500.00

Model CRM-15

Multi-Channel

Communications

Recorder

(Prices on Request)

Tandberg

Model 2

(two speed)

$249.50

Model 2F

(remote controlled)

$279.50

Model 3 Hi-Fi

(three speed)

$349.50

50-15,000

cycles (±1 db)

at 15" sec.

45-10,000
cycles (2 db)

16mm and
17.5mm film

200-7,500
cycles (=3 db)

at 7Vj"/sec.

200-3,500
cycles (=3 db)

at 3%" sec.

50-4,000
cycles (±2 db)

at l^s "/sec.

40-7,500
cycles (-2 db)

at 3 54 "/sec.

30-15,000

cycles (-2 db)

at 7Vi"/tet.

Data

Manufacturer

High fidelity lOJ/^" 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 2'/2 watt output. Adjust-
able 70Kc bias-erase oscillator with indicator. Less than
Yl second start and stop. Automatic head demagnetizing.
Precision revolution tape counter. Electrical remote with
automatic drive roller release.

flat to

about

6500

cycles at

3 3/ 4 "/sec.

All-purpose, single channel voice and signal recorders
capable of recording continuously for up to 24 hours
and 12 hours respectively. Electronic recording level in'
dicator. Signal being recorded may be monitored through
external headset. Use special, quick-change reels of 2"
wide tape on l'/^-mil "Mylar" base, printed with time
in minutes, indicating elapsed recording time or exact
time of recorded signal. Tape can be bulk erased for
immediate re-use. Inputs for telephone, line, microphone.
Outputs: speaker/headset. Dimensions: 17" x 11 J/2" x
JJ4) . Weight, approx. 25 lb.

Portable, professional-type, single-track recorder with tape
speeds of 7 J/2 and 15" (or 3% and IVi') 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 55 db.

Maximum harmonic distortion: 1.5% from full level.

Film capacity: 1000 feet.

Provides up to 15 simultaneous recording channels on
0.7" wide tape. Recording time, up to 4J/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 harmonic at *"0" input level. Negligible crosstalk
between channels. Push-button control. Fast forward
and rewind. Automatic stop.

Portable, dual-track recorder and playback unit with
extra-heavy flywheel and wow-proof belt drive. Flutter
and wow: below 0.1% at V/i /sec, 0.2% at 3%"/sec.
and 0.25% at 1^'Vsec. Signal-to-noise: 60 db at 7J/ 2 "/-
sec, 50 db at 3%" and l%"/sec. Playback output, 2J/2
watts, low level and high level. Electronic eye recording
level indicator. 5" by 7" speaker. Three-speed unit has
built-in program counter dial. Weight, 22 lb. — with
transport case. 27 lb.

Light-weight, dual-track recorder with 3^4" ta P e 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.

Model and Price

EMC

RECORDINGS

CORP.

806 E. 7th St.,
St. Paul 6,
Minn.

(Appearance

similar to

"Communicator"

on Page 6)

EMC

Stereophonic

Portable

Playback

Unit

$199.95
(tentative)

ERCONA
CORP.

551 Fifth Ave.,
New York 17,
N. Y.

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.

FENTON CO.

15 Moore St.,
New York 4, N.

Y.

Portable

Model 3AN

( 33/ 4 -7Vj ips)

$379.50

Model 3A/NH

(7i/ 2 -15ips)

$425.00

Custom

Installation

Model 66 N

{3%-7i/j ips)

$399.50

Model 66 H

(7'/,-15 ips)

$425.00

Ferrograph

Hi-Fi

Recorder

Tape
Deck

Frequency
Response

40-15,000
cycles ( -3 db)

«"» 7'/, "/sec.

" (2 heads)

$195.00
" (3 heads)

$225.00
" (4 heads)

$250.00

E.M.I.

Battery Portable

$395.00

Model L2A

(3% ip»)

Model L2B

(7i/ 2 ips)

Model L2C

(15 ips)

Console

Model

Unit 126

$2,750.00

Console

Model

"PIC-SYNC"

$4,000.00

Control Track Generator
Model 41 $125.00

FME
Model 47

$159.50

Fen-Tone

Motek

Tape Deck

Model K7

$79.50

50-10,000

cycles (±2 db)

at 7'/, "/sec.

40- 1 5,000

cycles (±2 db)

at 15 "/sec.

50-7,000

cycles (=2 db)

at 15"./sec.

50-5,000

cycles (-2 db)

at 7'/ 2 "/sec.

50-2,500

cycles (=2 db)

at 3 3 / 4 "/se«.

50-15,000

cycles ( = 1 db)

at 15"/sec.

50-15,000

cycles ( = 1 db)

at 15"/sec.

50-12,000
cycles at

7V, "/sec.

50-7,000
cycles at

3y« "/sec.

50-12,000
cycles at

7i/,"/sec.

50-7,000
cycles at

3 3/4 "/sec.

Data

This stereophonic playback unit reproduces half track,
full track, stereo colinear (in-line) and stereo staggered
tapes. Wow and flutter: less than 0.25%. Signal to noise
ratio at least 5 5 db when measured according to NARTB
specs. One Maico Dynamu 8040 "Ultralinear" upper
track head. One Maico Dynamu Stereo colinear (in-
line) head. (Gaps are less than .00015"). Two three-
stage pre-amplifiers plus cathode follower output. One
power amplifier. One 5" round 3.05 oz. special low-
frequency, low resonance speaker. One 4" round
"tweeter" with 1200 cps crossover network. Accom-
modates 7" reels.

Dual-speed, dual-track recorders for portable or custom
installation, manufactured by British Ferrograph Re-
corder Co., Ltd. of London. Signal to noise ratio, better
than 50 db, 200-12,000 cps; 45 db unweighted (includ-
ing hum). Wow and flutter, less than 0.2% at iy 2 "/sec.
Longterm speed stability, better than 0.5%. Erase and
bias frequency, 53,000 cps. Two inputs, for 1 megohm
and 0.1 megohm respectively. Output arrangements: 15
ohm elliptical speaker: jacks for extension speakers —
0.75 volts at 0.1 megohm for external amplifier. Output
power, 2J/2 watts into 15 ohms. Weights: Portable,
49% lb; Custom, 45 lb; Tape Deck, 18 lb.

Battery-operated recorder manufactured by Electrical (j
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 V/i "/sec. 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. 14J/2 lb. complete.

Professional type, single-track recorder with 15" tape
speed (7I/2" and 30" models available). Total noise and
distortion -64 db (ref. 2 J/2% 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 Y^" tape, with no interconnecting equipment.
Automatic Framing, which assures correct cueing of tape
and film, available at additional cost. Other application*
include Facsimile recording, multi-track, and telemeter-
ing, with frequency response to 100 KG

Portable light weight unit for "On Location" picture
synchronous sound track recording on '/£" tape. Used
with any portable tape recorder with 1 5"/sec. tape speed
and frequency response good to 14 KG, a control track
is simultaneously applied which later becomes the tape
speed control when played back on Pic-Sync recorder.

Portable, two-speed, dual track recorder. Signal-to-noise,
43 db. Flutter, less than 0.5%. Fast forward and rewind,
20-to-l ratio. Safety lock prevents accidental erase. In-
stant stop lever for editing. Neon recording level indi-
cator. Power output, 3 watts. 5x7 elliptical P.M.
speaker. Automatic reversible index counter. Input jack
for microphone or radio-phono. Output jack for monitor-
ing while recording or external hi-fi amplifier. Includes
ceramic mike and patch cord with built-in resistance net-
work to match recorder. Weight, 27 lb.

Three-motor-drive dual-track tape transport mechanism
for custom installation. Speed change by conversion
pulley. Wow and flutter, less than 0.25%. Adjustment
for head azimuth. Positive interlock of all switching and
braking mechanisms. Simple push-button control for
record, playback, fast forward, rewind and stop. Matched
preamplifiers also available. PRO-2, $89.50. TPR-1
$39.90.

AUDIO RECORD

Sept. -Oct., 1956

13

Manufacturer

FENTON CO.

15 Moore St.,
New York 4, N. Y.

INTERNA-
TIONAL
RADIO AND
ELECTRONICS
CORPORATION

South 17th St.
& Mishawaka Rd.
Elkhart,
Ind.

INTERNA-
TIONAL
SCIENTIFIC
INDUSTRIES
CORP.

2374 E. Hiway 24,
Colorado Springs,
Colo.

Model and Price

Fen-Tone

Brenell

Mark IV

Tape Deck

Mark IV (monaural) Mark IV/B (stereo)
$96.50 $114.50

BROADCASTER
Reel Sizes

to 7"
$435.00

JAMES

INSTRUMENT

LABORATORY

9110 South
52nd Court,
Oak Lawn,
III.

KEYSTONE
CAMERA
COMPANY,
INC.

Hallet Square,
Boston 24,
Mass.

IMPERIAL
Reel Sizes
to ioy,"

$449.00

IMPERIAL LP

Reel Sizes

to 14"

$478.00

»^Ti5 -I

"CROWN PRINCE"

Professional Series

(Rack mounting)

Dual Track

(lO'/j" reels)

$349.50

Full Track

(lO'/j" reels)

$399.50

Dual Track LP

(14" reels)

$375.00

Full Track LP

(14" reels)

$425.00

I.S.I. Tape Recorder

for rack or portable mounting

$465.00

Audikon

Model

V-12

For rack or

console mtg.

$460.00

Carrying Cases
$60.00

Frequency
Response

30-15,000

cycles (±3 db)

at 15"/sec.

50-12,000

cycles (-3 db)

at 7'/, "/sec.

50-6,500

cycles (-3 db)

at 3% "/sec.

20-20,000

cycles (=2 db)

at 15" sec.

20-15,000

cycles (±3 db)

at 7'/, "/sec.

40-8,000

cycles (±3 db)

at 3% "/sec.

(above data for

dual-track

operation)

20-18,000

cycles (2 db)

at 15 "/sec.

20-15,000

cycles ( ~1 db)

at 7'/, "/sec.

40-8,000

cycles (±3 db)

at 3% "/sec.

(dual-track)

30-15,000

cycles ( ±2 db)

at 7'/j" and

15"/sec.

30-8,000

cycles (±2 db)

at 3 % "/sec.

40-15,000

cycles (=3 db)

at 15"/sec.

40-12,000
cycles (±3 db)

at 7 '/j "/sec.

Data

Manufacturer

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 Yl 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.

Portable, 3 -motor, 3 -speed record/playback units avail-
able with choice of full or half-track heads (interchange-
able, plug-in type). Signal-to-noise; 55 db, 52 db and
44 db at 15", V/l" and 324" tape speeds respectively.
Flutter and wow; 0.10%, 0.15% and 0.25% respective-
ly. Fast forward and rewind, less than 35 sec. for 1200
ft. Dual-light VU meter for recording level — white
light for illumination, red light indicates record and
erase. Micro-Sync-Timing, 99.5% playing measured tape.
Inputs: two mikes plus radio-phono; two high-level mix,
both high impedance. Built-in amplifier with 30-watt
peak output, 15 watt peak at less than 1% distortion.
Speed reducer (available for all Crown models) gives
an additional tape speed of l%"/sec.

Rack-panel mtd. 3-speed record/playback unit with 3-
motor drive. Includes mike and phono preamplifiers.
Cathode follower output for playback through separate
amplifier systems. Flutter and wow; 0.12%, 0.18% and
0.25% at 15", 7I/2" and 3%" speeds respectively. Fea-
tures otherwise same as "Crown" series. Panel size; 19"
by 14" for lO'/V reel models, 19" by 21" for 14" reel
models.

Portable, two-speed, dual-track recorder with Isimetric
Drive and automatic servo control. Single-knob control
for play, record, skip and rewind. Includes play and
record electronics with cathode follower output, mike and
line inputs with mixing controls, electronic-eye level in-
dicator, and 3 heads with provision for adding 3 more.
Two-speed hysteresis synchronous capstan motor, auto-
matic cut-off and tape lifter. Playback noise, 55 db or
more below peak output on virgin tape. Overall noise,
50 db or more below peak output. Distortion not over
1% at normal level. Playback, std. NARTB curve. Skip
y rewind, less than 60 sec. for 1200 ft. Weight, under
40 lb. in portable case.

Two-speed, dual track recorder with \0Yi" reel capacity
and 3-motor drive. Hysteresis synchronous direct-drive
capstan. Push-button, interlocked relay control. Three
heads, monitors from tape while recording. Provision
tor 1 extra head. Fast forward and rewind, 40 sec. for
1200 ft. Timing accuracy, ± 3 sec. in 30 min. Signal-
to-noise, 52 db. Flutter and wow: below 0.25% at
7J4"/sec., below 0.15% at 15"/sec. Inputs: mixing of
mike and hi-level inputs, 50 ohm balanced and 500,000
ohm unbalanced. Cathode follower output for external
amplifier. 8 watts at 10 ohms to drive speaker or phones.
Weight: mechanism 36 lb., amplifier 10 lb.

Keystone

Load-O-Matic

Tape

Recorder

Model K-400
$199.50

40-15,000
cycles (±3 db)

at 7V,"/sec.

Portable two-speed dual-track recorder with automatic
tape-cartridge "magazine loading" that eliminates thread-
ing. Also accommodates standard 7" reels. Flutter and
wow, less than 0.5% at 7l/2"/sec. Electronic eye record-
ing level indicator. Pause control for recording or editing.
Drum-type index counter. Power output, 8 watts. Three
sneakers — one 6x9 "woofer" and two 4" "tweeters".
Separate PA input and separate output for external
speaker. PA system or monitoring signal while record-
ing. Includes pencil-type ceramic microphone, radio patch
cord and phono input.

RADIO

CORPORATION
OF AMERICA

RCA Victor
Division
Camden 2,
N. J.

RANGERTONE
INC.

73 Winthrop St.,
Newark 4,
N. J.

REVERE

CAMERA

COMPANY

230 East 21st St.,
Chicago 16,
III.

Model and Price

Orthophonic

Intermatched High-Fidelity

Recorder - Reproducer

Chassis

Type SRT-2

$490.00

"Rangerette"
Portable Model A-2

$1,500.00
complete

Console

Model

R-5C

with synchronizer

(Price on Request)

Model T-700D
$225.00

Model TR-800D

(with radio)

$275.00

Model T-700

$235.00

Model TR-800

(with radio)
$287.50

Model T-10

$245.00

Model TR-20

(with radio)

$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-1100

$169.50

Model TR-1200

(with radio)

$219.50

Model T-900

$199.50

Model TR-1000

(with radio)
$224.50

Model T-100

$169.50

Model TR-200

(with radio)

$224.50

Model T-500

$179.50

Model TR-600

(with radio)

$234.50

Frequency
Response

Playback from
standard tape,

30-15,000
cycles (=3 db)

40-12,000
cycles ( -2 db)

Record and
playback

40-12,000
cycles (-3 db)

45-15,000

cycles (=2 db)

at 15" sec.

50-8,000
cycles (=2 db)

at 7'/, "/sec.

45-15,000

cycles (=2 db)

at 15 "/sec.

50-8,000

cycles ( = 2 db)

at 7'/ J "/sec.

40-14,500

cycles (=3 db)

at 71/2" sec.

40-7,500

cycles (=3 db)

at 3%" sec.

80-8,000

cycles (=3 db)

at 33/4" sec.

60-15,000

cycles (=3 db)

at 7>/ 2 " sec.

as above

85-7,000

cycles (3 db)

at 3 % "/sec.

75-12,000

cycles (=3 db)

at 7'/," sec.

85-7,500
cycles ( -3 db)

at 3% "sec.

85-7,500

cycles - 3 db

at 3 Va "/see.

100-5,000

cycles (±3 db)

at 1 %"/sec.

Data

Semi-professional type recorder/ reproducer chassis with
direct synchronous motor tape drive. Recording speeds
of lYl" an d 3%"/sec, by selector switch. Electro dy-
namic tape tension and braking. Signal-to-noise, better
than 50 db with less than 3% distortion. Flutter and
wow, less than 0.2%. Fast forward and rewind, 45 sec.
for 1200 ft., with automatic tape lift. VU meter for
recording level indication. Transistor record and play-
back amplifier with printed wiring. High impedance
bridging input and low impedance microphone input.
Outputs, 0.6 v into 10,000 ohms or more and high
impedance monitoring jack. Can be mounted horizontally
or vertically. Dimensions: IOY2" x 19" x 8J/2". Weight,
35 lbs.

FOR SYNCHRONOUS SOUND RECORDING

Professional-type, single-track, dual-speed recorders, with
choice of T>Yi" , lYl '. 15" ° r 30" per second tape speeds.
Up to 2 hours recording at 1Yl" P er s e c - on H ree '
Distortion, less than 2% total harmonic. Maximum signal-
to-tape noise, 5 5 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 Synchronout
Sound Recording for $295.00.

Portable dual track lecorder available in either single 01
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
control'.

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
(3J-4 ips.) or dual (3% - 1Yl >P 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 V/& or
3J^ 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 lb.

12

AUDIO RECORD

Sept.-Oct.. 1956

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

$1,250.00

Model PB-17A

Tape

Reproducing

Mechanism

$700.00

Model A-904
Amplifier
$146.00

Continuous Tape Reproducing Console
$996.00

The Congressional

Model 7TR2

$159.95

The Judicial

Model 7TR3

$199.95

The Legislator Model 7TRC1
$279.95

"Victrola"

Stereotape

Players

Portable Model
8STP1 $295.95

Consolette Model
8STP2 $350.00

Frequency
Response

50-15,000
cycles at
15"/sec.

50-10,000
cycles at
7 V, "/sec.

50-15,000
cycles at
15 "/sec.

50-10,000
cycles at

7y, "/see.

50-8,000
cycles at

3%",sec.

50-8,000
cycles at

3 y 4 "/sec.

90-8,000
cycles at

7'/,"/sec.

70-12,000
cycles at

7 1/i "/sec.

60-12,000
cycles at

7'/, "/set.

70 to 12,000
cycles at

7Vj"/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 3f^" 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/4" 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 \0Vi" reel capacity only.

Portable, two-speed, dual-track recorders with push-
button control. Normal and overload neon recording
level indicators. Ceramic microphone with 7-ft. cable fits
into storage well. Take up to 7" reels. Rewind time,
2 min. for 1200 ft. Inputs for microphone and radio-
phono. Model 7TR2 has 5" x 7" speaker. Model 7TR3
has Panoramic Speaker System — one 6J/2" and two H/i"
speakers. Also window counter, voice-music switch, re-
mote control unit and provision for plugging in external
speaker.

Consists of Model 7TR3 recorder chassis mounted in
console type wooden cabinet with Panoramic Speaker
System — one 8" speaker and two iYl" speakers.

Stereophonic tape playback units in portable and consol-
ette models. Plays both single-track and dual-track tapes.
Two matched cases — one with tape mechanism and left
channel speaker system, the other with right channel
speaker system. Tape player has in-line (stacked heads),
and push-button controls for fast forward, rewind, stop
and two play buttons — one for stereo and one for con-
ventional tapes. Two-channel amplifier provides 2j/? watt
output for each channel. Each Panoramic Speaker System
consists of one 6I/7" speaker and two iYl" speakers.
Consolette model available in mahogany or light oak
finish.

MAGNECORD
INC.

1101 S. Kilbourn
Ave.

Chicago 24, III.

MAGNETIC

RECORDERS

COMPANY

7120 Melrose Ave
Los Angeles 46,
Cal.

Model and Price

PT6-S5A PT6-S5J

Recorder with Case Amplifier with Case

$365.00 $260.00

Without Case $340 Without Case $240

Frequency
Response

50-15,000

cycles (-2 db)

at 15", 'sec.

50-7,500

cycles (±2 db)

at 7'/,". sec.

Magnecord S36-B
Recorder and Preamp. with Case $395
Without Case 370

Magnecord
P60

Recorder Amp.
with case $765

without case 680

Tape Transport
with case $465
without case 415

Magnecord
P63

Recorder Amp.
with case $839
without case 764

Tape Transport
with case $465
without case 415

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

Portable
Reporter"

Standard

Model
$199.50

Deluxe

Model

$237.50

50- 1 5,000

cycles (2 db)

at 15 "/sec.

50-10,000

cycles (2 db)

at 7y," sec.

40- 1 5,000

cycles (2 db)

at 15" sec.

40-12,000

cycles (=2 db)

at 7Vj"/see.

50-15,000

cycles (2 db)

at 15",'set.

50-10,000

cycles ( " 2 db)

at 7t/,",sec.

30-15,000

cycles (±2 db)

at 15" sec.

30- 1 5,000

cycles (4 db)

at 7y," sec.

80-7,000
cycles

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 7!/ 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.

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, 0.37c. 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.

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
7l/2"/sec. Rewind time, 100 sec. for 2400 ft. Timing
accuracy, ± 3 sec. in 30 min. Separate erase, rceord 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.

Tape transport mechanism similar to above, but designed
for use with P63-J amplifier instead of P60-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 un-
balanced. 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.

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 plavback
amplifiers for simultaneous monitoring from tape. High
speed cueing control. Signal-to-noise, 58 db unweighted.
Flutter: 0.1% at 15"/sec, 0.15% at 7l/ 2 "/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 bridee input.
Line output, 600 ohms balanced or unbalanced.

Portable, battery-operated recorder with spring motor
drive. Power for amplifier furnished by dry batteries.
Spring drive lasts for 7 minutes at 7'/2"/sec. tape speed.
Can also be adjusted for 3%"/sec. tape speed. Can be
rewound while recording. Single control — off, palvback
record. Complete with batteries, microphone, head phone
(or speaker) and tape. Standard Model includes provision
for headphone plavback onlv. Deluxe Model includes out-
put amplifier and loudspeaker. Weight. 12 lb. Made in
England.

10

AUDIO RECORD

Sept. -Oct., 1956

11

Manufacturer

MAGNETIC

RECORDING

INDUSTRIES

11 E. 16th St.
New York 3,
N. Y.

Model and Price

Synchrotone

Dual
Model ML-63

$375

Synchro-
Magneticon

Dual

Model ML-65

$225

(in portable case, $245.50)

Synchro-Magneticon Dual Tape-Disc

Recorder-Reproducer Model ML-66, $275

(in portable case, $295)

MARK
SIMPSON
MFG. CO.
INC.

32-28 49th St.,
Long Island City 3,
N. Y.

MOHAWK
BUSINESS
MACHINES
CORP.

Brooklyn 33, N.Y.

THE

PENTRON

CORPORATION

777 South Tripp
Avenue,
Chicago 24,
III.

Voice-Master
Magnetic

Disc
Recorders

Voice-Master Streamliner $195

Voice-Master Challenger 295

Voice-Master Companion 229

Voice-Master Ordertaker 155

"MASCO"
Model 500

$168.50

Mohawk "Midgetape"

Battery Operated Portable

$249.50

[i"~^

j

"' ' ' <3

Mohawk

Message Repeater

Record-Playback

Unit $159.50

Playback Unit $79.50

Pentron

"Clipper"

Model RWN

$139.95

Frequency
Response

Data

Manufacturer

to 10,000
cycles at

7!/ 2 "/sec.

to 7,500
cycles at

3y 4 "/sec.

to 8,000 (tape)
to 5,000 (disc)

100-5,000 cps
100-5,000 cps
100-7,000 cps
100-4,500 cps

50-12,000
cycles (±3 db)

at 7yj "/sec.

50-7,000
cycles (±3 db)

at 3% "/sec.

200-5,000
cycles (-5 db)

at l%"/st»c.

200-5,500
cycles ( = 1 >/, db)

at 3 % "/sec.

50-9,000
cycles at

7i/j"/sec.

50-5,000
cycles at

3% "/sec.

Two independent channels, each with independent
recording-playback facility; simultaneous recording on
channel 1 and playback of channel 2; simultaneous play-
back of channel 1 and channel 2; facilities for listening
optionally to channel 1 or channel 2 or to both channels;
split-a-word control for instantaneous stop and start of
tape without slurring. Record safety interlock. Loud-
speaker or headphone listening; two speeds (3% and
7J/2 inches per second); single operation of record, listen,
fast forward, rewind and stop. Weight: 33 lb.

Two separate channels permitting simultaneous recording
on channel 1 and playback of channel 2; simultaneous
playback of channel 1 and channel 2; 324" per second
speed; single control operation for record, listen, fast
forward, fast reverse and stop. Fully automatic operation
eliminates external record-listen control. Record safety
interlock. Weight: 19 lbs. in portable case.

Educational language recorder using standard tape and
pre-grooved, reusable magnetic discs. Instant stop-start
without slurring. Remote control of magnetic disc. Tape
speeds 3% or V/ 2 ". Weight: 22 lbs.

Fully automatic magnetic disc dictating and transcribing
machine, recording on pre-grooved, reusable and foldable
magnetic discs. Features include semi-automatic or fully
automatic controls, automatic error correction, direct disc
indexing, instant stop-start, and syllable controlled back-
spacing (from mike or footcontrol). N.° record-listen
switch. Weight: 8 or 10 lbs.
Semi-automatic dictating-transcribing unit
Fully automatic dictating-transcribing unit
Fully automatic transcribing unit
Telephone recording unit

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 in-
dicators, safety record-lock button, 5" x 7" oval speaker,
ceramic microphone and patch cord. Fast forward and
rewind, 90 sec. for 1200 ft. Immediate stop from any
speed. Inputs for microphone and radio-phono. Outputs
for external speaker and external amplifier. Weight,
23 lbs.

Portable, dual-track recorder. Self-contained battery power
supply. Battery life 45 hours. Battery life indicator light.
Cartridge-loaded ('/2 hour to a side.) Rewind, manual,
two minutes for v| hour recording. 3 controls: On-Off,
Play-Record, and Volume. Wow and flutter, less than
0.7%. Signai-to-noise ratio, 42 db. One microphone input,
high impedance (1 mv min.). Output for earphone or ex-
ternal amplifier. Tape, %", "Mylar" base. Supplied with
microphone, earphone, batteries, and tape. Accessories
available. Size: 8'/ 2 " x PA" x V/ 8 ". Weight, 3 lb.

Midget, recorder/playback unit with continuous-loop tape
cartridges of from 15 to 240 seconds capacity. Repeats
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, 6I/2" x 5J4" x 5 '/J".
Weight: 5?4 lb.

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 V/z'/sec. 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.

THE

PENTRON
CORPORATION

777 South Tripp
Avenue,
Chicago 24,
III.

Model and Price

Pentron
"Pacemaker"
Model T-90

$199.95

Pentron "Emperor"

Model HFW-500

$299.95

Pentron

"Encore"

Tape Player

Model TP-3
$149.95

Pentron
Stereophonic
Tape Player

Model PS-1
$249.95

■mSm o

PREMIER

ELECTRONIC

LABORATORIES

382 Lafayette St.
New York 3,
N. Y.

Pentron
"Dynacord"

Model DM-2

Tape Mechanism

$395.00

Model DS-10
Preamplifier
$130.00
Tape Mechanism Case, $30.00

Amplifier Case, $25.00

"Tapesonie"

Model 70-C
$398.75

Frequency
Response

50-10,500
cycles at

7'/, "/sec.

50-5,000
cycles at

3% "/sec.

40-12,000 cycles

at 7yj"/sec.
40-6,000 cycles

at 3% "/'sec.

50-8,000
cycles at

71/, "/sec.

50-5,000
cycles at

3% "/sec.

(as above)

40-15,000

cycles ( =2 db)

a; 15" sec.

40-10,000

cycles ( -2 db)

at 71/2" sec.

30-18,000

cycles (=3 db)

at 15" sec.

30-15,000

cycles (=3 db)

at 7'/," sec.

30-7,500
cycles (=3 db)

at 3% "/sec.

Data

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 7J/£ 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, 33 lb.

Portable two-speed, dual -track tape playback unit with
"Unimagic" single-lever control for play, fast forward
and rewind. Plays any standard 7J/£"/sec. and 324"/sec.
recorded tape. Complete with amplifier and speaker.
Single-track units also available ($154.95).

Consists of two-speed tape deck and two preamplifiers
in consolette wood cabinet. Plays stacked stereo, stag-
gered stereo, full track or half-track tapes at 7J/^" or
J4"/sec. Preamps equalized to NARTB standards. Sepa-
rate volume, tone and master gain controls. "Unimagic"
single lever control for play, fast forward and rewind.
Instantaneous automatic braking. Shipping weight, 33 lb.

Professional type, dual-speed recorder for rack or portable
mounting. Standard speed, 71/2 " and 15"/sec. Also avail-
able for 324" ar) d 7I/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 three-speed recorder. Three
motors, including hysteresis synchronous drive motor.
4J/2" VU meter. Push button operation using seven re-
lays 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 chan-
nels for mike, radio or phono inputs. Full protection
against accidental erase. Bass and treble controls 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. D.C. on
preamp heaters. Push-pull 12 watts audio output.