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Re: Question about Primary Inner Diameter~
Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Pyrotrons-at-aol-dot-com>
Aron and I have used primary to secondary coil spacings of 3/4 to 1" on ALL
of our Tesla Coils (about 20) including several twins. From a 1.5" secondary
powered -at- 100VA, to a 12" secondary running 10kVA. Transformer output
voltages from 4kV up to 21.6kVRMS (the big coil).
On our old 4.5" TC running 15kV 900VA, the primary got as close as 3/8". No
problems. We have never had problems with arcing *provided* that the system
is in tune.
Good luck, happy coiling,