"RadioGuy" wrote in message
...


Yes well... I can't say the receiver will be totally passive but it
won't be
too much more complicated than the basic crystal detector. At the
most,
roughly speaking, three more component parts will be needed.

RG



Demodulating SSB/CW is theoritically possible with an entirely passive
circuit. If there's a very high Q circuit at the proper frequency, it
will ring enough to give a good sidetone to CW and even demodulate SSB.
I have a couple of old single crystal filter receivers that can do just
that. Tuning is very touchy, and it takes alot of signal, especially
for SSB.

You'd need a proper frequency crystal, or a very, very, very, large
tuned cavity for starters. Being within the shadow arc of a powerful
SSB/CW transmitter would also be helpful. As a practical matter, it's
best done as a mind exercise.

Frank Dresser