Re: Suicidal Secondary--Solved!

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

Original poster: "Marry Krutsch by way of Terry Fritz <twftesla-at-qwest-dot-net>" <u236-at-earthlink-dot-net>

Hi JW, all

	I was using my 2 copier xfmrs in series, with the inner secondary wires
tied together and floating.  The primaries were wired in anti-parallel
(MOT style).  I don't know how much they were pulling, but I was running
them on a 15 amp breaker with no problem.  I was using two 500 watt
wireround resistors as chokes.

	As for the MOT supply, I used 2 xfmrs with primaries in anti-parallel,
and the secondaries in series, with cores tied together.  I used the
standard voltage doubling circuit with MO diodes, but I used 2.5 uF
doubler caps (too big, since I toasted all my diodes within 5 sec. :-0
).  I'm going to buy a bunch of small diodes this weekend and string
them together, so that I can still used the big caps.  I don't know how
much the MOTs were pulling either, but they were running on seperate 15
amp circuits.

Have fun!
	Winston

Tesla list wrote:
> 
> Original poster: "J Whyte by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<xoom321-at-hotmail-dot-com>
> 
> >From: "Tesla list" <tesla-at-pupman-dot-com>
> >To: tesla-at-pupman-dot-com
> >Subject: Suicidal Secondary--Solved!
> >Date: Tue, 15 Jan 2002 08:01:04 -0700
> >
> >Original poster: "Marry Krutsch by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> ><u236-at-earthlink-dot-net>
> >
> >
> >       Hi everybody!
> >
> >       Thanks to all who helped me out.  In a last ditch effort (short of a
> >new coil) to get rid of racing sparks, I put a thick coat of epoxy on
> >the secondary.  I just tested it, and it works great!  I cut a hole in a
> >plastic trash can lid and slid it over my secondary so that it covered
> >the primary.  This eliminated primary-secondary arcing.  I was able to
> >lower the secondary an inch from its previous position.  My old coupling
> >was around 0.12, and now it's 0.21!  With two copier xfmr's I had a few
> >racing sparks, but with another epoxy coat, these should go away.  I had
> >several measurable strikes to 5 feet, and streamers that were longer.  I
> >hooked up my un ballasted MOT supply, blowing the rest of my diodes (but
> >who cares ?!  :-)), and the coil put out two or three 5 footers at once,
> >with a few single streamers to at least 6.5 feet!  I love it when these
> >things work the way they're supposed to :-).  I can't wait to set this
> >thing set up where I have more space.  Then I can open the gap some
> >more.
> >
> >       Thanks again,
> >               Winston K.
> --------------------------------------------------------------------
> 
> I am curious, are your photocopier xmfr's in series or parrallel
> configuration? How many watts are you drawing from the XMFR's???
> I am also curious about your MOT supply....how many MOT's are you using, and
> in what sort of configuration?
> JW
> 
> _________________________________________________________________
> Get your FREE download of MSN Explorer at http://explorer.msn-dot-com/intl.asp.