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Electronics-World-1959-05

High Fidelity AM and FM

High Fidelity AM and FM reception in a Single Set HEAT HK IT MODEL PT -1 Professional Stereo -Monaural AM -FM Tuner Kit Enjoy stereophonic broadcasts as well as outstanding Individual AM and FM radio reception with this deluxe 16 -tube AM -FM- stereophonic tuner combination. Features include three etched circuit boards for high stability and case of construction, prewired and prealigned FM front end, built -in AM rod antenna, tuning meter, FM -AFC (automatic frequency control) with on -off switch, and flywheel tuning. A multiplex jack is also provided. AM and FM circuits are tuned individually making it ideal for stereo applications since both AM and FM can be used at the same time. A switch selected tuning meter functions on either AM or FM. Cathode follower outputs with individual level controls are provided for both AM and FM. Other features include variable AM bandwidth, 10 kc whistle filter, tuned -cascode FM front end, FM AGC and amplified AVC for AM. Anywhere from 1 to 4 limiters or IF's assure smooth, non -flutter reception on weak or strong stations alike. The silicon diode power supply is conservatively rated and is fuse- protected assuring long service life. Flywheel tuning combined with new edge -lighted slide -rule dial provide effortless tuning. Use of three printed circuit boards greatly simplifies construction. Vinyl -clad steel cover is black with inlaid gold design. Shpg. Wt. 20 lbs. MODEL FM -3A $2695 HIGH FIDELITY FM TUNER KIT The Heathkit FM -3A Tuner will provide you with years of inexpensive hi -fi enjoyment. Features broad - banded circuits for full fidelity and better than IO uv sensitivity for 20 db of quieting. Covers the complete FM band from 88 to 108 mc. Stabilized, temperaturecompensated oscillator assures neglible drift after initial warmup. Employs a high gain cascode IF amplifier and has AGC. Power supply is built -in. IF and ratio transformers are prealigned as is the front end tuning unit. Two outputs provided, one fixed, one variable, with extra stage of amplification. Shpg. Wt. 8 lbs. HIGH FIDELITY AM TUNER KIT MODEL BC -IA 62666 The BC -1A incorporates many features not usually expected in an AM circuit particularly in this low price range. It features a special detector using crystal diodes and broad band -width IF circuits for low signal distortion. Audio response is *1 db from 20 CPS to 9 kc with 5 db of pre -emphasis at 10 kc to compensate for station rolloff. Covers the complete broadcast band from .550 to 1600 kc. Prealigned RF and IF coils eliminate the need for special alignment equipment. Incorporates AVC, two outputs, two antenna inputs and built -in power supply. Shpg. Wt. 9 lbs. MODEL W -6M $10995 "HEAVY DUTY" 70 WATT HI FI AMPLIFIER KIT Designed for "rugged duty" called for by advanced hi -fi systems and P.A. networks. Silicon diode rectifiers assure long life and heavy duty transformer provides excellent power supply regulation. Vari- able damping control provides optimum performance with any speaker system. Quick change plug selects 4, 8 and 16 ohm or 70 volt output and the correct feedback resistance. Shpg. Wt. 52 lbs. 82 MODEL W -5" $5975 25 WATT HI FI AMPLIFIER KIT Enjoy the distortion -free high fidelity sound from one of the most outstanding hi -fi amplifiers available today. Features include a specially designed Peerless output transformer and KT66 tubes. Frequency response is ± I db from 5 to 160,000 CPS at I watt and within 2 db 20 to 20.000 CPS at full 25 watts output. Hum and noise are 99 db below 25 watts. Shpg. Wt. 31 lbs. MODEL W -4AM $3975 SINGLE CHASSIS20 WATT HI FI AMPLIFIER KIT A true Williamson -type high fidelity circuit, the W -4AM features 5881 push -pull output tubes and a special Chicago- Standard output transformer to guarantee you full fidelity at minimum cost. Harmonic distortion is 1.5% and IM distortion is below 2.7% at full 20 watt output. Hum and noise are 95 db below full output. Taps for 4, 8 or 16 ohm speakers. Shpg. Wt. 28 lbs. MODEL W -3AM $4976 DUAL CHASSIS 20 WATT HI FI AMPLIFIER KIT Another famous Williamson -type high fidelity circuit, the W -3AM features the famous Acrosound TO-300 " ultralinear" output transformer and 5881 tubes. The power supply and main amplifier are on separate chassis for installation flexibility. Harmonic distortion is less than I% and IM distortion is less than 1.2% at 20 watts. Shpg. Wt. 29 lbs. ELECTRONICS WORLD

www.americanradiohistory.com Monaural- Stereo Preamplifier Kit (2- Channel Mixer) This unique kit allows you to purchase it in the monaural model if desired and then add the second or stereo channel later. The SP -2 features 12 separate inputs, six on each channel, with input level controls. Six dual concentric controls consist of: two 8- position selector switches, two bass, two treble, two volume level and two loudness controls, a scratch filter switch and a 4- position function switch. A separate on -off switch is provided. The function switch provides settings for stereo, 2- channel mix, channel A or B for monaural use. Inputs consist of tape, mike, mag phono and three high -level inputs. NARTB equalization and RIAA, LP, 78 record compensation are provided. A remote balance control is included. Printed circuit boards for easy assembly. Built -in power supply. Shpg. Wt. 15 lbs. MODEL W -7M $5495 MODEL UA -1 $2195 HEATHKIT MODEL SP -2 (STEREO) "EXTRA PERFORMANCE" 55 WATT HI FI AMPLIFIER KIT Enjoy this high fidelity power amplifier at less than a dollar per watt. Full audio output and maximum damping is conservatively rated at 55 watts from 20 CPS to 20 kc with less than 2% total harmonic distortion throughout the entire range. Features famous "bas -bal" circuit, EL -34 output tubes and special 70 volt output. Shpg. Wt. 28 lbs. "UNIVERSAL" 12 WATT HI Fl AMPLIFIER KIT The versatility and economy of this fine kit make it a truly "universal" hi -fi amplifier. An ideal basic amplifier for any hi -fi system or a perfect addition to gear your present hi -fi system to stereo sound. Uses 6BQ5 /EL84 push - puH output tubes for less than 2% harmonic distortion throughout the entire audio range. Shpg. Wt. 13 lbs. J I MODEL SP -1 (MONAURAL) $3795 Shp, Wt. 13 ms. MODEL C -SP -1 CONVERTS SP -1 TO SP -2) $2195 Shpg. Wt. 5 IDs. HEATHKIT MODEL WA-P2 "MASTER CONTROL" PREAMPLIFIER KIT c,rotr,,l sour th, .stern II11h this compact unit. ` Features 5 switch- selected inputs to accommodate a record changer, tape recorder, AM tener. FM tuner. TV receiver, microphone, etc.. each with level control. Provision also for a tape recorder output. Equalization for records through separate turnover and rolloff switches for LP, RIAA, AES and early 78's. Shpg. Wt. 7 lbs. ELECTRONIC CROSSOVER KIT MODEL X0-1 $1895 This unique instrument separates high and low frequencies and feeds them through 2 amplifiers into separate speakers. Located ahead of the main amplifier, it virtually eliminates IM distortion and matching problems. Note: Not for use with Heathkit Legato speaker system. Shpg. Wt. 6 lbs. MODEL A -9C $3550 MODEL SW -1 $2495 MODEL TK-1 S995 GENERAL -PURPOSE 20 WATT AMPLIFIER KIT Designed for home installation as well as for PA requirements, the A9 -C combines a preamplifier, main amplifier and power supply all on one chassis. Four switch - selected inputs are provided as well as separate bass and treble tone controls offering 15 db boost and cut. Detachable front plate allows for custom installation. Shpg. Wt. 23 lbs. SPEEDWINDER KIT A real timesaser, the SW -I leaves your tape recorder free for operation while rewinding tape at the rate of 1200 feel in 40 seconds. Prevents unnecessary wear to the lape and recorder. Handles up to 101/2' tape reels. Handles 800' reels of 8 and 16 millimeter film as well. Automatic shutoff prevents whipping at end of rewind. Shpg. Wt. 12 lbs. 12" UTILITY SPEAKER KIT Replace inferior speakers in radio or TV sets to obtain better tone quality or set up an auxiliary speaker for testing purposes with this convenient, high quality speaker. The speaker will handle up to 12 watts with a frequency response of ±5 db from 50 to 9,000 CPS. Speaker impedance is 8 ohms and has a 6.8 oz. magnet. An outstanding dollar value. Shpg. Wt. 7 lbs. COMPLETE TOOL SET 1 hese haste tools are all sou need to build any Heathkit. The pliers, diagonal side cutters, 2 screwdrivers, and soldering iron are all of top quality case hardened steel for hard duty and long life. Pliers and side cutters are equipped with insulated rubber handles for safety. A good example of just how easy Healhkil building really is. Shpg. Wt. 3 lbs. May. 1959 83

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