"william_b_noble" wrote in message
news:1129443990.371761fa123e7cca0b6df5fa678f46c1@t eranews...
high voltage mica caps aren't hard to find, I have a 30,000 VAC mica cap
sitting here at this moment - it's about 8 inches X 6 inches X 12 inches,
with a 8 inch insulator on top, the case is one terminal, the other is on
top of the insulator.

I suspect your TIG welder needs a lower voltage.

Mica has particular dielectric benefits in certain frequency bands - and
oil dripping out is not a real problem, jsut remove the cap, refill with
oil and seal it again. use mineral oil if you can't find capacitor oil.

Just make sure it's oil in there, not PCB. What vintage is the machine?

regards,

John