30 Aug
2006
30 Aug
'06
9:47 p.m.
On Wednesday 30 August 2006 11:58 pm, Ethan Dicks wrote:
On 8/31/06, Michael Holley <swtpc6800 at
comcast.net> wrote:
:-)
Anybody having any vacuum tubes they don't want, I might be interested. I
can't offer much of anything for them, but if they're gonna get tossed...
--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
-
Information is more dangerous than cannon to a society ruled by lies. --James
M Dakin
I recently got a book titled High-Speed Computing
Devices 1st ED. 1950...
I have been adding to my magazine scans. I found a decade counter circuit
implemented with four 12AU7 tubes (dual triodes) in the October 1955
Radio & Television News. (50 year rule.)
http://www.swtpc.com/mholley/ElectronicsWorld/Oct1955/RTVN_Oct1955.htm
Cool! I happen to have a dozen 12AU7s here in my desk - they were
discarded from the stock shelves when they cleared out "Skylab", the former
home for a wad of experiments dealing with aeronomy and auroral observation
- Carl Sassenrath of REBOL fame worked there once, many years ago).
Hmm... a decade counter with 4 tubes... with a dozen tubes, I'm
half-way to a digital clock - just add nixies!