Brenda Ann wrote in message
...

"RadioGuy" wrote in message
...
With the proper hookup you will get a tone---and the tone will be
adjustable
in frequency depending upon operator preference.

Ah, but then it wouldn't be a totally passive receiver. The OP is looking
to
use only the passive receiver, not any add-ons or external sources.


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

"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