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IC'S FOR THE EXPERIMENTER (Continued from page 33) between J1 and the board audio input. Don't forget to solder the 1.1 tap to t

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The New 1969 Improved Model 257 A REVOLUTIONARY NEW TUBE TESTING OUTFIT 411' ' s .R ® COMPLETE WITH ALL ADAPTERS AND ACCESSORIES, NO &apos

PRODUCTS (Continued from page 22) between 12 and 16 volts) ; 2- ampere maximum output current; 10- transistor, three -diode (one zener) circuitry; f

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¡near for Cs the Low -cost package Experimenter IC's has many uses -like building an FM wireless mike April, 969 By this time, most everybody

© O O gilioK D21 16 Q 0 0 0 0 TAB 910 1 os 07 5 o 20 $% BOTTOM VIEW Fig. 1. The KD2116 consists of four closely matched npn transistors arranged

o o Y TAB BOTTOM VIEW o o o o Fig. 3. The KD2115 is com- plete audio amplifier in a TO -5 can. When driven from a low -level signal, this IC

O KD2114 O 0 0 02 o o SUBSTRATE TA B BOTTOM VIEW 10 Fig. 5. The KD2114 also contains four npn transistors, arranged as an isolated pair and a

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POPULAR ELECTRONICS VOLUME 30 NUMBER 4 APRIL, 1969 WORLD'S LARGEST -SELLING ELECTRONICS MAGAZINE SPECIAL FEATURE LINEAR IC'S FOR THE EXPERI

M5 Fig. 18. Author's prototype may be duplicated or used as a guide. Because of the length Fl of M7, the Power Supply mod- ule, it is

wave with a frequency 1/10 that of the input. It should be about 1.8 volts in amplitude and have a 6:4 duty cycle. This, of course, is also th

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JI MIC Fig. 1. A low -cost commercial transistor amplifier saves a lot of wiring. Besides its use in noise control, the circuit can also

particular amplifier in your project. In most cases, this will be a common type of high- impedance microphone. The au- thor used a low -cost

HOW IT WORKS Room sounds are picked up by the microphone and passed through the LEVEL control to the audio amplifier module. The load for

Medical electronics now measures eye !movements caused by that tipsy feeling BY DEAN WARE

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6 good reasons to get into electronics: 62 POPULAR ELECTRONICS

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the product gallery REVIEWS AND COMVENTARY ON ELECTROLIC GEAR AND COMPONENTS TERADO TRAY- ELECTRIC (Power Source Model 50 -160) Most inverters (12

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10 Reasons why RCA Home Training is your best investment for a rewarding career in electronics: Performing transistor experiments on programmed bread

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computer to work to solve the problem. Af- ter reducing the original list to 15,000 "most - popular" types, and supplying performance,

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SHORT -WAVE LISTENING (Continued from page 93) kHz, is often good in English at 0030 -0100; they run until 0345 Sunday with a live dance

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