17 Feb
2008
17 Feb
'08
2:03 p.m.
On Feb 17, 2008, at 3:04 PM, Tony Duell wrote:
More seriously, there are a couple of books called
'The Voice of the
Crystal' and 'Instruments of Amplficiations' written by a chap who made
(AM) radio receivers using no commercial electronic components (he does
use shop-bought enammeled copper wire). In the second book, he makes a
few triode vlaves and both point-contact and (copper oxide) juction
transistors.
The devices have a pretty poor performance, and a very short lifetime.
But they do work. And I suspect it's possible to do better, even in a
lab
of 1900.
I have both of these books; I bought them from Lindsay last summer.
They're both fantastic! I've not yet built anything from the info
contained therein, but I hope to.
-Dave
--
Dave McGuire
Port Charlotte, FL