[AMRadio] EUREKA!!! It WORKS!...(Two tube Superhet.)

[W7QHO at aol.com]

I'm sure many subscribers will remember the two-tube superhet circuit 
described in QST and several Handbook editions back in the 40s.   Essentially a dual 
triode (6SN7, 6C8, 6F8, etc.) regenerative detector/single-stage audio amp 
setup preceded by a 6K8 (triode hexode) converter.   The "IF" frequency was 
around 1700 kc.   Big advantage here over more simple regen designs was the 
isolation from antenna effects provided by the converter stage.   Built one of these 
for 80M back in the 50s when I was a kid.   Worked quite well as I remember.

Dennis D.   W7QHO
Glendale, CA



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