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" 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.