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Crystal radio
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April 7th 05, 01:50 PM
Al
Posts: n/a
In article ,
wrote:
We dropped molten solder in a pile of sulpher in a bottle cap.
On 5 Apr 2005 20:45:34 -0500,
wrote:
When I was in high school (many MANY years ago), a classmate of mine
"grew" his own crystal by melting (IIRC) lead and sulfur together.
It was an ugly-looking mess, but it worked.
You were making "galena" which is PbS, Lead Sulfide. I used one for my
first crystal radio in the 50's. Had to find a sensitive spot. You might
be able to find some in a hobby shop (If you can find one.) that deals
with minerals.
You might also try a "blue blade" razor blade. The GIs used them in WWII
for making foxhole radios. The bluing produced a chemical (unknown to
me) that rectified the signal.
Al
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