Re: synch with a pole pig coil (again)

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

Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" <Tesla729-at-cs-dot-com>

In a message dated 8/1/03 12:08:54 PM Pacific Daylight Time, 
tesla-at-pupman-dot-com writes:
>The RF currents are due to the oscillation of primary LC. Hmm, how can I
>put this?
>Are you saying the RF heating would be reduced by reducing how often the
>gap oscillates?
>I know, that sounds odd the way I've worded it. Anyway, I'm contemplating
>the situation and just wanted to clarify that point.
>
>Take care,
>Bart

Hi bart,

Yep, I think you may have summed it up in better wording :^)
Since there are fewer oscillations per second, that would mean
that the total current flow over the entire second would be less
although each individual oscillation would have the same current.
Whooo -- I'd better shut up before I really get confused :^P
The bottom line is that at a given power supply input, the higher
the bps, the harder it is on the capacitor and the more succep-
table the cap is to dielectric heating. That's why i figured that the
120 bps may not be as hard on the cap as 300+ bps. Of course
I must also consider that each individual bang will be larger, too
(assuming that I go to a larger capacitance), and that will tend
to increase the RF currents, so it's probably 6 of one and a half
dozen of the other :^)

< PS. David, I like the 0.165uF.

Yes, I believe I'm going to try the cap in that configuration while
closely monitoring it for signs of excessive stress and/or heating.
I believe I need to go to that kind of primary capacitance to bet-
ter utilize the available power of a 10 kVA pig at 120 bps.

Like I said, the 42 kV ceiling seems a little on the low side for
a pig power supply and that somewhat concerns me. If I made a
"boat anchor" out of this beauty, you would see a grown man cry :^(
I've had this cap for nearly 6 years and I haven't come across another one
like it yet. John Freau mentioned that he had used 45 kV rated Maxwells
with PTs, I believe, at up to 1000 watts, but I'm wanting to run
some 10 times that :^O. I gues we'll have to wait and see.

David Rieben