21 Aug
2008
21 Aug
'08
6:32 p.m.
On 21 Aug 2008 at 20:44, William Donzelli wrote:
(one of my) Pet Peeve - when people use some big ass
Compactron sweep
tube to represent a typical computer tube. Cripes!
Indeed, the first computer circuits I remember purchasing used dual-
triode submini tubes with wire leads--ISTR 6 of them per PCB. I
bought them for the tubes used as VHF amplifiers--and the silvered
mica caps on the boards. The tubes themselves were mounted on metal
plates on either side of the PCB and in spring clips and had round
bases, not the flat ones that you'd find in a Pixie radio (my first
2N109 went into a socket scavenged from one of those). Most likely
from some military gear.
Got 'em from one of the surplus places on S. Michigan in Chicago--
back when surplus was good pickings...
Cheers,
Chuck