Brenda Ann wrote in message
...

"RadioGuy" wrote in message
...

- wrote in message
...
I am intrigued with the idea of a totally passive reciever -one that
requires no power source- and so find myself looking into building a
crystal set for myself. I found what appears to be a pretty easy
build-up at this page: http://antiqueradio.org/econmain.htm

To my non-expert eye, it appears to be a very well thought out, clever
design.

My questions a

1. Is it possible to modify the design to also allow for the clear
reception of ssb signals while maintaining the "passive"
characteristic
that I find so appealing?
2. Would it be difficult to modify the design to allow reception above
the stated ~17Mhz upper limit to, say, 30Mhz?

Any input/thoughts will be much appreciated.


You may not be able to receive SSB with a crystal set but give Morse
code
a
try, you might have better success. Can you figure out a simple way to
do
it?
;-)

RG


Morse is pretty easy with a crystal set.. that's what foxhole radios were
for. You don't get a tone, which makes it a little harder to copy, but
you
can just listen for the carrier keying, all the intelligence is there even
without a tone.



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

I thought Foxhole radios were field expedient devices using an oxide
finished razor blade (Gillete) and pencil point for detector---in the usual
crystal set hookup. The radios were used by US service men in combat
overseas WWII to receive local AM broadcasts. I have a copy of a Foxhole
radio article that appeared in a 1948 (?) issue of QST authored by a fellow
who served in the Pacific theatre somewhere in my files.

OK... how many of you fellows cut your fingers on that razor blade building
that set? It got me more than once!

BTW... I'm RadioGuy and I'm BACK! HELLO ALL!

RG