I spent my youth in a place where CB was more popular in the early 1960s  than it  was in the 70s. There were dozens of basement and garage labs turning out CB "Leeneeeyaars" that varied from brilliant to lethal. The brilliant one was not  an amplifier, but an AM transmitter that used a CB rig as an exciter. Fair and G&G were the suppliers of the components for that one. At the time, 1625 tubes were 19 cents each in quantity. Surplus power and modulation transformers, and filter chokes, were also not very expensive. Five 1625s were the driver and final, modulated by four more 1625s. The modulator tube in the CB transceiver drove the modulators in the "amplifier". The  now unmodulated RF output was the exciter.  It worked and sounded very good. The lethal version used five 25JS6s in parallel with the filaments in series for 120 volt power in. The 120 volts went into a quadrupler that gave well over 500 volts on the plates. A car marker light bulb  (12 volts at about 1 1/4 amp) in series with the plate supply indicated the plate current, a loosely coupled #47 indicated output. Tuned to the maximum by a typical CBer the signal was as nasty as one could imagine. These are only the surface of many tales of electronic engineering done by people there who had learned enough about the craft during WW2 to be very dangerous. In a weird sort of way, these creations were also a lot of fun and very educational. 

   B. Gentry, KA2IVY

A digression, but i was last night looking at a book on 'CB Linears'. There was a paragraph up front that explained the basics of the "smoke theory of electronics". A diverting  alternative to our usual concerns with electron flow.

-Hue Miller

Sent from my Galaxy

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