Jumping in with both feet?
From: SBJohnston-at-aol-dot-com [SMTP:SBJohnston-at-aol-dot-com]
Sent: Friday, January 30, 1998 2:59 PM
Subject: Re: Jumping in with both feet?
John Freau wrote:
>Did you try re-tuning (tapping) outward by a couple of turns
>when the metal dome is installed?
Yes, I believe I did go out to the full 11 turns, still no go. I'll have to
>> It was interesting to see how the voltage builds, then POW,
>> builds then POW, builds then POW, builds then POW.
>The gap may be firing at a sub-multiple of 120 times per
>second, perhaps 60 times per second or less because of the
>wide gap setting.
Hmmm... The gap seemed too wide, but performance was more dramatic.
>If this is happening, the voltage on the cap resonantly charges
>to a higher than normal voltage and may destroy the tranny
>and caps. I forget what size tranny you're using,
15 kV 30 ma - but only half of the secondary in circuit.
>but it may be too small for the capacitor. Sometimes if you
>use a 140V output variac, it provides the tranny with just
>enough power to achieve 120 BPS even with a slightly- too-
I'll try reducing the gap and dropping back to three caps for a total of .015
and see how it runs, adjusting the primary size to compensate for secondary
Thanks for the suggestions...