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Monday, August 15, 2011

Bike Radio II

Thanks for all the suggestions on the bike radio. I googled around a bit and found a schematic that seems very similar to the little receiver I'm working with. I almost certainly would be better off starting anew (perhaps keeping the AF circuitry). But it is interesting to see how a simple AM receiver works. That first transistor is an autodyne circuit -- both a mixer and a oscillator.

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1 comment:

  1. when the oscillator and mixer are combined, it is called a converter stage. I would be half tempted to rewind the ferite rod antenna and the oscillator coils for 40 meters. Rig up some sort of controlled feedback in the IF for a BFO and call it a day. - KA9OOI Mark in the corn fields of Indiana

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