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

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

Original poster: "Jolyon Vater Cox by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>

Robert,
Is a choke required even if the rectifier is simply a string of sixty 1N4007
diodes in series with the supply rather than a bridge rectifier?
Jolyon.


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, November 07, 2002 3:09 PM
Subject: Re: Rotary gap for (severely!) current-limited DC supply?


 > 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?
 >  >
 >  >
 >
 >
 >