28 Mar
2001
28 Mar
'01
10:46 a.m.
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
I read somewhere that a piece of coke (the fuel, not
the drug, OK :-))
was used by POWs in the second world war as a detector. Using much the
same cats whisker arangement as with the galena crystal. Might be worth
a
try.
I will work but you want to find a peice that has really been fired and
has a
bit of rainbow color to it. IT's the contaminating oxides and all that
makes it
work though germainium is better.
I would recomend getting the set working with a
germanium diode first.
Then, when you know the coil, tuning capacitor, headphones, aerial,
earth, etc are OK, try the home-made detector.
Good way to go.
Allison