Re: Another MOT powered TC Circuit

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

Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

List, Greg Hunter asked some good questions about my DC charging reactor
setup which I thought I should answer on the list.  Greg Leyh may want to
add some further advantages.

Greg,

1) The charging reactor does indeed charge the tank cap to about twice the
power supply voltage.  This is good for lower voltage higher current
supplies such as those using MOTs.  The dual MOT supply only puts out about
12 KV DC when unloaded.  When it is supplying a few hundred ma, it drops
down to 8-9 KV.  2) It also allows one to put a RSG directly across the DC
power supply.  Without the choke, the RSG will just power-arc.  With the
choke, if the RSG break rate is high enough (electrode dwell time low
enough), it allows the RSG to quench the spark before the choke saturates
and runs the current way up (initiating the power arc).  3) Final advantage
is allowing one to use a non-synchronous higher break rate so that smaller
tank capacitance can be used and one can still run a lot of power into the
primary
(power is directly proportional to break rate).   400 or 500 BPS has a nice
"musical" quality to the streamers.  4) Bonus - it's a bit different and fun
to experiment with.  It is the scheme Greg Leyh uses with his monster coils.

That said, my next adventure will be oven style doublers like yours (sine
wave 0 to 12 KV output) married to a TSG.  It's the only way I can think of
that one can use a voltage multiplied MOT supply with a TSG.  As I reported
before, I tried that with the SPDT gap (two TSG firing alternately) and
could not keep them from both firing at once which was a disaster.  I
haven't tried a TSG with the charging reactor MOT doubler setup, but I don't
see
how it wouldn't power arc unless there was a tremendous blast of air to blow
out the arc.  Comments regarding this from list would be welcomed.

--Steve

----- Original Message -----
From: "Gregory Hunter" <ghunter31014-at-yahoo-dot-com>
To: "S & J Young" <youngs-at-konnections-dot-net>
Sent: Sunday, October 14, 2001 10:13 AM
Subject: Re: Another MOT powered TC Circuit


> Steve,
>
> What advantage are you claiming for this circuit? The
> dual MOT/voltage doubler/filter circuit already
> provides about 12kvdc. I know something of charging
> chokes, I've worked with them in radar power supplies
> before. Does the reactor in your circuit provide
> higher voltage? Can you quantify the performance
> advantage (at least in general terms) of this circuit?
>
> Thx,
>
> Greg
>
> --- S & J Young <youngs-at-konnections-dot-net> wrote:
> > Hi Greg,
> >
> > The attachment is a dual MOT voltage doubler and
> > charging reactor powering a
> > conventional asychronous RSG TC.  It is
> > significantly more efficient then
> > the dual MOT tripler powered SPDT RSG circuit.  The
> > only downside is that
> > the RSG BPS must be at least 400 BPS to avoid RSG
> > power arcing.  This setup
> > produces 53 inch streamers between dual 4 x 23 inch
> > twin coils with about 1,400Watts DC.
> >> > --Steve Young
> >
> __________________________________________________
> Do You Yahoo!?
> Make a great connection at Yahoo! Personals.
> http://personals.yahoo-dot-com