Re: Rotary gap for (severely!) current-limited DC supply?

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

Original poster: "robert heidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-desertgate-dot-com>

Jolyon:  Any DC coil is not sync with any line voltage. When you use a
rectifier you are now a DC coil system. Your current is extreamly low, but
you still nead a choke between your DC source and your spark gap to
disconect your supply when the spark gap fires and prevent loading down your
supply. I use a small 15T coil. Any coil over that will work as long as it
is long enough to prevent arc over ( 2", 50-60 mm)
     Robert  H

 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > Date: Tue, 05 Nov 2002 13:05:11 -0700
 > To: tesla-at-pupman-dot-com
 > Subject: Rotary gap for (severely!) current-limited DC supply?
 > Resent-From: tesla-at-pupman-dot-com
 > Resent-Date: Tue, 5 Nov 2002 13:08:34 -0700
 >
 > Original poster: "Jolyon Vater Cox by way of Terry Fritz 
<twftesla-at-qwest-dot-net>"
 > <jolyon-at-vatercox.freeserve.co.uk>
 >
 >
 > When using a rectifier with high voltage supply with limited current
 > capability
 >
 > (to charge the cap with DC instead of AC) the break rate falls with
 > increasing primary tank capacitance when a static gap is employed.
 >
 > Bearing in mind that the max I have achieved so far was a 5" spark from
 > 2.89 dia x 10.875 secondary with primary capacitor of 21nF -and only then
 > when a>24" bike wheel was used for a topload (the primary cap was charged
 > from DC rectified ignition coil), would there be any benefit in using a
 > rotary gap in the setup described and what would be best ie. static gap, an
 > asynchronous rotary or a synchronous rotary gap?
 >
 > Also, to what might a synchronous gap be synchronised in such an unusual
 > system?
 >
 > And are there formulae or spreadsheets available for calculating the
 > LTR,resonant and STR capacitance values for transformers running at
 > frequencies other than 50/60Hz with non-sinusoidal waveforms?
 >
 >