Re: [TCML] Suspect component

[Scott Bogard <sdbogard@xxxxxxxxx>]

Yeah, I have yet to dabble with solid state other than flyback drivers
myself, so I can understand that.  At any rate if you just seek a quick and
dirty 4 kV that is adjustable you can go the doubler route (like you did)
or you could use a second MOT until you figure out how to do the
ballasting.  The doubler is lighter so I can see how it is attractive.  I
think I would use a series primary (or secondary) capacitor to ballast as a
lightweight solution, adjust the size to be close to 60 Hz resonance for
maximum power, and farther away from resonance to cut it back.  I wouldn't
have any idea on how to calculate the size though, and having a bunch of
caps lying around might be costly and take up too much room.  The advice I
can offer is concerning a Jacob's ladder, when using low voltages like that
it is best to use a Gabriel electrode, as the arc can tend to get stuck
near the base.  That's about all I have unfortunately, I'm sure others will
comment!


On Fri, Jul 5, 2013 at 4:01 PM, Reverend Fuzzy <pastor@xxxxxxxxxxxxxxxxx>wrote:

> Solid state will always be the dream, but currently, funds are limited.
> The "end game" (as you call it) is to be a power supply that will be
> of the adjustable variety... possibly power small SG tesla coil, and with
> the turn of a switch or two, get a small jacob's ladder going.
> (of course, ballast will be bypassable)
>
> > -----Original Message-----
> > From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Scott Bogard
> > Sent: July 05, 2013 8:27 AM
> > To: Tesla Coil Mailing List
> > Subject: Re: [TCML] Suspect component
> >
> >      Just my opinion but if the idea is to drive a TC, and you are only
> > using one MOT, why bother with a ballast at all?  Or a doubler for that
> > matter?  If you go solid state like SISG or the like a single MOT should
> > work fantastic as is, and you can limit spark length by changing BPS
> > (assuming triggered SISG).  I made a rotary gap coil using twin MOTs with
> > no doubler and it works great, but may be overpowered for your
> application.
> >  I'm interested to see what your end game is here...
> >
> > Scott Bogard.
> >
> >
> > On Thu, Jul 4, 2013 at 1:20 AM, Reverend Fuzzy <pastor@xxxxxxxxxxxxxxxxx
> >wrote:
> >
> > > Nothing odd going on, that was just a typo.
> > > It's been corrected.
> > > The smaller MOT (secondary shorted) is used
> > > as ballast for the larger one.  The cores
> > > are isolated from each other.
> > >
> > > Updated schematic:
> > > http://www.msbministries.org/documents/cc/hvproject.pdf
> > >
> > > Pic of smaller MOT's core, shorted (just for fun):
> > > https://www.facebook.com/photo.php?fbid=10201747419514248&l=3e35fe39b2
> > >
> > >
> > > > -----Original Message-----
> > > > However, your proposed circuit is a bit odd.
> > >
> > >
> > >
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