RE: 833 coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Trimmell" <humanb-at-chaoticuniverse-dot-com> 

Chris is indeed correct. The standard Voltage doubler configuration has
the filament grounded and with RF bypass there should be no significant
voltage difference between filament tranys core and the windings (do
ground the core). The only times I have had problems was when working
with a old Staccato circuit of John F's and was having phasing issues...
Remember that when using a SCR in a Staccato pulser a V rating of
600-800V is more than enough.

David Trimmell


 >>>>>>Snip<<<<<<<<<<<
Tube coil designs that use a high voltage on the cathode are somewhat
hard
to come by.  IMHO it's much easier to elevate the primary circuit to the

high voltage and ground the filament (with an appropriately sized RF
bypass
capacitor between the leads of course), that way you can get away with
wrapping your own filament tranny and not have to worry about insulation

there.  Isolating the primary is something that is very easy to do,
since
you already need a good deal of airspace between it and the secondary.

Chris Arnold