HE Radio Constructor AUDIO ELECTRONICS
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RADIO TELEVISION -HE Radio Constructor AUDIO ELECTRONICS VOLUME 18 NUMBER 3 A DATA PUBLICATION TWO SHILLINGS & THREEPENCE October 1964 extra features for your TAPE RECORDER Top Pocket Transistorised Simple M.W. Receiver * Transistor Mains Transistor Radio Calibrating Oscillator ^ for Beginners Intercom A NEW EDDYTONE MODEL THE RUGGED COMPACT `EC 10' TRANSISTORISED COMMUNICATIONS RECEIVER ..Lu.-,.tl...lâ3_....-LI. 63 76 1 it 13 14 7.i..1.,_ 53 e ... Si. '-7'7'-td-..a Five ranges give complete coverage from 550 kc/s to 30 Mc/s. Precision LIGHT anPORTABLE flywheel -loaded slow-motion drive with 110 to 1 reduction ratio. Uses GOOD thirteen semi -conductors, including REALLY stabilising Zener diode, resulting in PERFORMANCE excellent performance on all ranges. Internal speaker and panel jack for telephones. Self-contained battery unit. Aerial inputs for single wire aerial, balanced or unbalanced feeder, and for short rod or whip. Selective audio filter USEFUL IN CAR,CARAVAN, and SHACK for improved c.w. reception. Robust BOAT, LOUNGE construction and modern styling. Dimensions are 122 inches by 6$ S to 30 MC/S inches by 8 inches. Weight with 550 kc1 battery 141b. List Price £48 STRATTON ..& CO.LTD. BIRMINGHAM En:land THE NEW RADIO AND TELEVISION by C. A. QUARRINGTON, A.M.BRIT.I.R.E. RADIO AND TELEVISION is the most up-to-date work which deals with the principles, design considerations, applications, component parts, maintenance, adjustment and repair of radio and television. Essential for every radio and television engineer and enthusiast, these four magnificent volumes have been designed to meet the needs of all connected with this branch of engineering. By mastering everything in this work and using it for reference, you can join the ranks of men who are sought after because they know the trade from A to Z. FREE INFORMATION BUREAU. To every purchaser we offer a free postal information service to keep him in touch with what is happening today, what happened yesterday, and even what may happen tomorrow. SOME OF THE CONTENTS Waves in free space - Inductance - Capacitance - The tuned circuit SEND NOW FOR FULL INFORMATION - Detection - R.F. pentode - R.F. amplifier - The superheterodyne - Frequency changing stage .- A.G.C. and tuning indicators - R.F. coils, screens and switches - Output stage - Press -button tuning - To THE CAXTON PUBLISHING CO. LTD., Combined A.M. and F.M. receivers - Transistors and diodes - Power 1 Dept. 73/28, Gatehouse Industrial Estate, Aylesbury, Bucks supply and decoupling - High fidelity and stereo reproduction - Please send me full information about "Radio and Television" III Microphones and pre -amplification - Tape recording - Car radio - , Low -power transmission - Video signal - Waveform generator - , Synchronising circuits - Automatic gain control - Vision detection NAME (BLOCK LETTERS PLEASE) and amplification - Interference limiters - Colour television - , Aerials Fault diagnosis Workshop equipment Voltage and - - - ADDRESS. current testing - Testing basic components - Instability and motor - boating - Mains hum and background noise - Tracing distortion - , 1 Radio receiver alignment - Blank screen - Poor interlacing, television , - Pattern on screen - Television receiver alignment - Projection RT 73/28 111 television. OCTOBER 1964 145 HI-FI AMPLIFIERS TUNERS RECORD PLAYERS ---w S-33 S-99 AT -6 MA -12 HI-FI 6W STEREO AMPLIFIER. Model S-33. 3 watts per channel 0.3% GOLDRING LENCO TRANSCRIPTION PLAYER. Model distortion at 2.5W/chnl., 20dB N.F.B. Inputs for Radio (or Tape) and Gram, GL -58. With G-60 pick-up arm and Ronette 105 cartridge. £20.1.3 Stereo or Monaural, ganged controls. Kit £13.7.6 Assembled £18.18.0 GARRARD AUTO/RECORD PLAYER. Model AT -6. With DE LUXE STEREO AMPLIFIER. Model S -33H. De luxe version of the S-33 with two-tone grey perspex panel, and higher sensitivity necessary to R 105 cartridge. £13.12.1 With Decca Deram pick-up £14.6.1 accept the Decca Deram pick-up. Kit £15.17.6 Assembled £21.7.6 SUGDEN MOTOR UNIT "CONNOISSEUR CRAFTSMAN". HI-FI STEREO AMPLIFIER. Model S-99. 18W output. Ganged controls. Heavy duty motor operating at 334 and 45 r.p.m. Very heavy 12" Stereo/Mono gram., radio and tape inputs. Push-button selection. Printed turntable. Virtually no rumble. £17.2.11 circuit construction. Kit £27.19.6 Assembled £37.19.6 HI-FI MONO AMPLIFIER. Model MA-5. A general purpose 5W POWER SUPPLY UNIT. Model MGP-I. Input 100/120V, 200/250V. Amplifier, with inputs for Gram., Radio. Presentation similar to S-33. 40-60 c/s. Output 6.3V, 2.5A A.C. 200, 250, 270V, 120mA max. D.C. Kit £10.19.6 Assembled Kit £5.2.6 Assembled £6.12.6 £15.10.0 A wide range of American equipment available under direct mail order scheme. HI-FI MONO AMPLIFIER. Model MA -12. 12W output, wide Full details and catalogue 1/- post paid. freq. range, low distortion. Kit £11.18.0 Assembled £15.18.0 L50j Choose Heathki't mode/s for Performance FOR THE INSTRUMENTALIST TEST INSTRUMENTS PA AMPLIFIER PA -1. The T.V. ALIGNMENT GENERATOR. Model ideal compact unit for VOCAL- HFW-1. Offers max performance at lowest cost. ISTS, INSTRUMENTALISTS, Covers 3.6 to 220 Mc/s fundamentals. Elec- RECORDS, with 50 Watt out- tronic sweep oscillators. Built in marker put, 2 Heavy Duty Speakers. generators (5 Mc/s crystal) Variable TREMOLO. Elegant £30.15.0 Kit modern cabinet. Kit £54.15.0 £44.10.0 Assembled Assembled £74.0.0 HFW-1 5" GENERAL-PURPOSE LABORATORY OSCIL- Legs optional extra 17/6 set of 4 LOSCOPE. Model IO -12U. This outstanding oscil- POWER AMPLIFIER MA -50 loscope, with its professional specification and styling, 50W output. Kit £19.18.0 fulfills most laboratory and service requirements. Vertical frequency response 3 c/s to over 4.5Mc/s, sensitivity Assembled £27.18.0 IOmV r.m.s. per cm. at I kc/s.. T/B covers 10 c/s - 500 kc/s. Kit £32.12.6 Assembled £41.10.0 ELECTRONIC ORGAN 24" PORTABLE SERVICE 'SCOPE. Model OS -1. This (fully transistorised). Ideal for Soloists, Home use, Groups. FULL 20 is a light, compact oscilloscope, ideal for servicing, etc. WATTS VOLUME. £187.10.0 Matching bench £14.10.0 extra. uB Dimensions 5"x8"xl44" long. Wt. 1041b. -12U Kit £21.18.0 Assembled £29.8.0 IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIWIIInIIIMIIII110IIIIIIIIIIIIIIIIIIIIInIIMIIIIIIIIUIIIIIIIIIIIIIII11IIIIIIIIIIIIIIIIIIIII 111III1111II11IIWlllllllll1101lllllllllllllll11llllllllll IO ELECTRONIC SWITCH. Model S -3U (Oscilloscope TRANSISTOR RADIOS Trace Doubler). Enables a single beam oscilloscope to give simultaneous traces of two separate and independent "OXFORD" LUXURY PORTABLE. signals. Switching rates approx. 150, 500, 1,500, 5,000 Model UXR-2. Specially designed for use and 15,000 c/s. Sig. freq. response 0-100 kc/s. f 1dB. as a domestic, car or personal portable Separate gain controls and sync. output. Sig. input range receiver. Many features, including solid 0.1-1.8V r.m.s. Kit £12.18.0 Assembled £18.10.0 leather case. Kit £14.18.0 DE LUXE LARGE-SCALE VALVE VOLT- METER. Model IM -13U. Circuit and speci- TRANSISTOR PORTABLE. Model UXR- fication based on the well known model V -7A but with many worth -while refinements. 6" Ernest 1. Pre -aligned I.F. transformers, printed Turner meter. Unique gimbal bracket allows circuit. Covers L.W. and M.W. Has 7" operation of instrument in many positions. Modern x 4" loudspeaker. Real hide case. styling. Kit £18.18.0 Assembled £26.18.0 Kit £12.11.0 AUDIO SIGNAL GENERATOR. Model AG -9U. IM -13U 10 c/s to 100 kc/s, switch selected. Distortion less than TRANSISTOR PORTABLE RECEIVER. 0.1 °% 10V sine wave output metered in volts and dB's. Model RSW-1. In a ha:;dsome leather case, Kit £22.10.0 Assembled £30.10.0 it has retractable whip aerial and socket for car radio use. Covers Med., VALVE VOLTMETER. Model V-7A. 7 voltage ranges Trawler and d.c. volts to 1,500. A.c. to 1,500 r.m.s. and 4,000 peak two S wave bands. Kit £19.17.6 to peak. Resistance 0.10 to 1,000MG with internal battery. D.c. input impedance 11Mn. dB measurement, has JUNIOR TRANSISTOR RADIO. Model centre-zero scale. Complete with test prods, lead and UJR-1. Single transistor set. Excellent UJR-1 standardising battery. introduction to radio. Kit £2.7.6 Kit £13.18.6 Assembled £19.18.6 MULTIMETER. Model MM -1U. Ranges 0-1.5V to 1,500V a.c. and d.c.; 150µA to I5A d.c.; 0.20 to 20MO. Money -back Guarantee 44" 50µA meter. Kit £12.18.0 Assembled £18.11.6 Daystrom Limited unconditionally guarantees that each Heachkit R.F. SIGNAL GENERATOR. Model RF -1U. Up to product assembled in accordance with our easy -co -understand 100 Me/s fundamental and 200 Mc/s on harmonics. Up to RF -1U instruction manual must meet our published specifications 100 mV output. Kit £13.8.0 Assembled £19.18.0 for performance or the purchase price will be cheerfully refunded. A WIDE RANGE OF BOOKS ON ELECTRONICS AND RADIO AVAILABLE. SEND FOR LISTS OF PRICES 146 THE RADIO CONSTRUCTOR - *. TAPE DECKS CONTROL UNITS -- TAPE AMPLIFIERS FM -4U AM/FM COLLARO D-93 Model FM -4U. Also available in two units. R.F. "STUDIO" TAPE DECK. The finest buy in its price HI-FI FM TUNER. COLLARO (£2.15.0 incl. P.T.) with I.F. output of 10.7 Mc/s, and amplifier Operating speeds: 31" and 74" p.s. Two tracks, "wow" tuning unit range. unit, with power supply and valves (£13.3.0). Total Kit £1$.18.0 and "flutter" not greater than 0.15% at 74" p.s.