Lots of discussion about using the 829 for VHF power amplifiers, and
even audio amplifiers and conversation pieces. But I haven't seen
mention here of their use in pulse generators. I have a TS592A/UPM15
pulse generator that uses one in its output stage (not all my test
equipment is very new ;-), and one of the early uses of them was as a
driver in "hard tube" radar pulse modulators, developed fairly early
in WWII. They were used in "Model 3 hard tube pulsers" for example,
where the two sections were run in parallel, outputting well over a
kilowatt during the microsecond long pulse, 0.1% duty cycle. The very
similar 3E29 also get lots of mention in early radar pulser history.
Perhaps someone knows: was the 3E29 an 829 re-designed and/or
specifically tested for use in pulsers? What was the 829 originally
intended for, and when was it first introduced? Who made the first
ones, RCA or someone else?

Cheers,
Tom


"Dave" wrote in message tnews.com...
Hi all,

I just found several 829B tubes - believe it or not in my garage - I
must have got them in a box of stuff at a ham fest at one time.
A check on Ebay shows they're pretty much worthless for the sake
of dollars, but they're so COOL! With the two plate caps that are
actually just stiff pins, they look like little Martians.

I put a pair on my office credenza just to look geeky cool. Fresh
out of the box as NOS they look amazing - just like they were made
yesterday. It's a pity they have no value - maybe as a homebrew
project??

So can someone tell me what they would have been used for?
Something tells me they're a VHF power tube.

Any application as a one-tube QRP rig of any sort? Any stories
about using them in the past? I've built a lot of little rigs over the
years, but never knew about the 829

Thanks,

Dave