Info wanted: IBM vacuum tube digital computer demonstrator

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Tue Feb 25 17:59:10 2003

> Also posted is the schematic of the TH-1, "one shot" using the 2D21
> tube (SCR with a pilot light!).

Shouldn't that be XCR, not SCR :-)

(SCR = Silicon Controlled Rectifier. Presumably the 2D21 (EN91 to me) is
a Xenon Controlled Rectifier )

-tony
Received on Tue Feb 25 2003 - 17:59:10 GMT