Schematics of Atanasoff-Berry Computer logic circuits?
cclist at sydex.com
Fri Aug 22 00:15:56 CDT 2008
On 21 Aug 2008 at 23:48, William Donzelli wrote:
> Yes, and they sucked anyway.
1N21s could be pretty touchy mechanically and not at all uniform. As
a "microwave diode", I don't think they would have even been
considered for digital logic.
They weren't the first packaged solid-state diode. Copper-oxide
rectifiers were around since the 1920's, but have lousy reverse-
voltage ratings (are they still used in the Simpson 260 VOM?).
Selenium rectifiers were around a short time before the war, but not
popular till afterward (I can still recall the smell of a failing
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