On Dec 24, 3:23�pm, John Ferrell wrote:
I have been successful at modeling and then constructing transmitter
matching circuits at low power with common sizes of capacitors. Now I
want to move up to the 1 KW power level. Inductors are easy enough to
homebrew but capacitors are both expensive and scarce. Anyone have
ideas or maybe experience in this area?

DigiKey has a good selection of High Voltage units (3 KV Plus) at
modest cost but considering their size and the losses expected in the
capacitors I don't think they can dissipate the heat...

John Ferrell W8CCW

Hi John, Are you using L networks for matching? If so, then you want
a variable capacitor to be able to match a variety of loads. TenTec
sells a 500pf ~3kv variable capacitor kit for about $50 that I have
used with good results. It is the one that they use in the antenna
tuner that they sell. Takes about a hour or so to put together.

If you want some cheep low pf fixed caps use either RG-8 for real hv
and RG-58 for just hv. Consult the data books for the pf/foot rating
of the cable, or measure with Z meter or antenna analyzer.

Gary N4AST