This looks like an interesting piece of kit:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&Item=330299130000&Category=1504
An "A43984 Henry RF Power Supply".
It looks a bit of a "home brew" solution to capacitors: Fixed doorknobs and
adjust the last few pFof tune and load with a couple of sets of two plates, one
on a thread with a sheet of PTFE in the middle, but I guess it works!
I recently saw a 4PR1000A amp which had the opposite solution: fixed
doorknob-type capacitors and a Pi inductor that was squeezed or stretched by a
piece of threaded PTFE through the middle, though this one looks like a Pi-L
I'd guess at around 10MHz, but there looks like quite a lot of L in the plate
choke for that.
If it's only run at 2kW out, I think that makes the tube potentially
under-rated by 75% unless there's a really low HT.
The transformer looks a bit smaller thsan many I've seen. I recently got a
quote from TEC in Basildon for a 4.5kV at 10kva single phase transformer and it
was going to weigh 250lbs and measure about 1 foot cubed. Oo-er. Nearly twice
my weight. I did worry about putting this in an upstairs shack, but I guess
it's only like a fat lad sitting in the corner!
cheers
Dave G0OIL
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