28 Mar
2001
28 Mar
'01
3:01 p.m.
When I built mine, we (the CubScout pack) used toilet paper roll cores which we
varnished and then applied our magnet wire. We even went rock hunting to find
galena crystals to use. I don't remember any sort of diode ... there could've
been one, though ... that was nearly 50 years ago, after all.
Dick
----- Original Message -----
From: "Paul Braun" <nerdware(a)laidbak.com>
To: <classiccmp(a)classiccmp.org>
Sent: Wednesday, March 28, 2001 9:50 PM
Subject: Re: Crystal Radios (was Re: List spammer ID'd)
But if you REALLY want to do it right, you wind your
own coil on a
shellacked oatmeal box.....or, a shellacked salt box.
All of mine used a germanium diode and a prewound coil, so there.
I'll shut up now.
Paul
of bricks tied to its head."
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
Paul Braun WD9GCO
Cygnus Productions
nerdware_nospam(a)laidbak.com
"A computer without a Microsoft operating system is like a dog without a bunch
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