raypsi wrote:
On Dec 29, 1:21 pm, "Tio Pedro" wrote:
Anyone really, really old dudes on hear who can advise
on how much RF power an 01 can handle? Can it drive
a 45 power stage?

Pete

Hey OM
How old is a really really old dude? Is that like Methuselah?
Although Ima really old fart. I think there would be to much gas in
that tube for you to use it for anything but a gas regulator tube. I
bet it would fire up at 150 VDC wit that nice blueish glow.

73 OM
n8zu
The 01A was considered a 'hard vacuum' tube, the '00 was a 'vapor' tube,
or soft vacuum tube. The only reason that the '00 was even made was
because many 'old timers' (at the time that the '00 came out) remembered
using the ORIGINAL DeForest Audio which was a soft vacuum tube. By
carefully adjusting the plate and filament voltages a very sensitive
operating point could be found. The tube was probably acting as a
thyratron at this point, on the verge of super-conduction. The '00
could also operate this way, but since it's manufacture was more
controlled than the original Audion the operating point was well known.

Even with it's 'hard vacuum' the 01 didn't have as good a 'getter' as
later tubes and would arc over with more than 130 volts or so. It was
used as a transmitter before the type 202 tube became widely available,
but was a QRP thing, less than a watt input.