21 Aug
2008
21 Aug
'08
10:15 p.m.
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
one).
Cheers,
Chuck