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#6
May 21st 06, 02:24 AM
posted to rec.radio.amateur.homebrew
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Direct Conversion Receiver with NPN transistors
There was an article in QST many years ago ( late 1960's ??) which was one of the early direct conversion articles. This one used 88 mH filters, and a three transistor audio amplifier. It was written by Doug Demaw, if memory serves, and it is probably the simplest, but useful, direct conversion design I have ever seen. Granted, getting 88 mH coils is not as easy as it was back then, but all in all, I think this fits the original request. The radio used NPN transistors thoughout. Jim N6BIU |
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