21 Apr
2005
21 Apr
'05
1:06 a.m.
Hi,
William Donzelli said:
There were some very small wire ended ones made for proximity fuzes in
anti-aircraft shells. They are about the size of one of those small
neons. Someone in the USA has a stock of new ones and I wouldn't mind
getting a few to play with, but I've lost his address.
Back in the '60s I had a little portable radio that used wire-ended
valves/tubes about half an inch diameter and an inch long.
There were also some vacuum tube ics being produced experimentally a
few years ago with a few hundred planar devices in one package.
--
Cheers,
Stan Barr stanb at dial.pipex.com
The future was never like this!
- What was/is the smallest tube? purpose?
RCA's Nuvistor - a family often found in late 1960s TV tuners and some
test equipments. They are almost always triodes, and are really small -
3/4 inch long, maybe 3/8 inch diameter, all metal. RCA made a few half
sized Nuvistors, but never sold them.
Sylvania also made some subsubminis - tubes in T1 bulbs, but they never
sold either. A T1 bulb is 1.8 inch in diameter.