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Re: Capacitor Size and BPS



Original poster: FutureT@xxxxxxx In a message dated 12/25/05 12:49:36 PM Eastern Standard Time, tesla@xxxxxxxxxx writes:


Hi John,

Seems like, even with a pig, the best processed power can be had with
a SRSG at 120 BPS and a Cp of 2.8*Cres (no different than with a
NST).  However, the value of Cp to get this may become very expensive
forcing many to use STR valued caps.  Given STR operation, one then
would need to increase the BPS to get back to the processed power
levels of LTR operation.  It would also seem that as the BPS was
increased, gap losses and heating in the tank cap become increasing
issues.  Would you recommend LTR operation if the cap cost was not a
consideration??

Gerry R.


Gerry,

Yes, it's been my position for quite a few years that somewhat
LTR is best even for pigs, to keep resonances down and to
to get the benefit of the lower break rates.  I don't bother stressing
the issue these days because a lot of folks like the
sound and visual effects of the variable higher break-rates, and
because of the expense issues, etc., and because the pigs
seem to work reasonably efficiently even at the higher break rates.

But what I meant in posting to the other coiler was that with NST
coils, the 120 bps sync operation is more important for obtaining
good performance than with the pig coils which are generally
more tolerant of the various break-rates.

John