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VK2ZRG > HBREW 06.04.06 13:30l 52 Lines 1835 Bytes #999 (0) @ WW
BID : 2344_VK2ZRG
Read: GUEST DF1GG
Subj: Re: Galena crystals - how?
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DK0WUE<7M3TJZ<CX2SA<F1BBI<VE2PKT<VK2DOT<VK2XGJ<VK2IO<VK2WI
Sent: 060406/0002Z @:VK2WI.#SYD.NSW.AUS.OC #:10966 [SYDNEY] FBB7 $:2344_VK2ZRG
From: VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
To : HBREW@WW
VK2ZRG/TPK 1.83d Msg #:2344 Date:06-04-06 Time:0:01Z
G0TSU wrote re home brew (the radio type) :-
>Greetings
>In the endless pursuit of technical investigation (hi) I'm wondering how
>to procure a galena crystal to make a "proper" receiver (although LED's,
>FET's and pretty much anything with a junction works).
>
>Not having studied chemistry, and not online, my library says they are
>a lead/sulphur product.
>I've cut up pieces of pure lead, and mixed it in a sulphur soloution,
>now it's evaporating.
>Hopefully I'll get some kind of crystal I can use.
>
>Apparently they suffer from oxidisation, and from what I hear are not
>moisture resistant.
>
>So come on all you OM's out there, enlighten me, how do you make them
>(if possible)
Hello Dem,
I made some sort of a galena crystal in my youth. I suppose I would have
been about 10 years old at the time. What I did was to melt some lead in
a ladel. (The ladel was heated with a blow lamp.) When the lead had
melted I stirred in some yellow sulphur powder which I had bought from a
hardware store. The sulphur catches light of course, and produces acrid
sulphur fumes, so this was done out of doors.
I seem to remember that it did work in my crystal set (home made of course)
but not as well as a germanium diode. You probably can't buy sulphur at a
hardware store any more. (The tiny tots would make gunpowder from it I
suppose.)
Oh, by the way Dem, the first paragraph of you bulletin was all one line of
200 characters. In fact, only one line was less than 80 characters. It word
wrapped in the middle of words in TPK, so I added some CR/LFs to your bulletin
for this message.
73s from Ralph VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
Taglines by Colin Coker G4FCN
C Program run, C Program Crash...ReWrite in Pascal!
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