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Re: power transformers
Original poster: "rob by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rob-at-pythonemproject-dot-com>
Tesla list wrote:
> Original poster: "R. Bergmann by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> Thanks for the info and for sticking up for me.
No problem. I have a unique vacuum tube tesla coil here. A 3ft high 2ft
diam form with copper tubing. It resonates at 1.8Mhz, and is driven
with 3kW from an Eimac 8877 tube (It my ham linear amp). Puts out a
nice big purple flame. Unfortunately, the 8877 is a very expensive
investment and requires forced air cooling as it has an external metal
anode with radiator fins. My power supply is 3500V at 5kVA max (weighs
Some other tubes worth trying for a small coil would be the 1625, 811,
and 813. They are old WW2 vintage types and are available for
practically nothing ($1 to $10) at ham swap meets.
The Numeric Python EM Project