21 Apr
2005
21 Apr
'05
10:09 a.m.
wasn't there some urban-tech legend about the Americans getting
hold of a Cuban MIG fighter and laughing at the low-tech electronics they
found?
Purportedly - the Russians were using tubes! ..that are claimed to be EMP
proof.
EMP as in nuke-you-lar bomb (some important guy pronounces it like that!
bizzare..)
Now, perhaps tubes could be EMP tolerant, but they wouldn't be radiation
tolerant,
would they? After all, isn't that how Geiger-Muller rad counter tubes work?
Any mil-space-design spooks out there worked with rad-hard technology?
I've read 4000 cmos is the wrong thing use for your home-made nuke
countdown unit,
but that RCA1802s fared better in early OSCAR and other satellites...
h
"Tom Jennings" <tomj at wps.com> wrote
> In the '60s I saw a rocket control computer
that was used in a high
> acceleration missile that was IIRC about 30 cm cubed. It was made up of
> layers of ceramic approximately 3-5 mm thick each containing around
50-100
> "tubes" separated by a thin 2-3 mm
layer of ceramic insulation. Each
"tube"
> consisted of an Americium cathode, the necessary
grids (perforated
plates),
> and a plate evaporated on the wall of the cavity.
Everything was
> interconnected by metalization on the insulating layer. The necessary
> resistors/capacitors were placed in cavities between the "tubes".