From: Tony Duell <ard_at_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
Received on Wed Mar 28 2001 - 18:46:43 BST