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Re: [TCML] MOTS
When i get back home this thanksgiving i am going to have to find that army surplus store near me.
are there any helpful hints i should follow when designing my coil to run on 2 Mots?
-------------- Original message --------------
From: G Hunter <dogbrain_39560@xxxxxxxxx>
> The HV bushings are just hardware store PVC plumbing fittings glued in place
> with regular solvent glue. The AC power cable passed through a regular cable
> clamp like the ones used on household breaker boxes. It's leakproof as long as
> the can doesn't tip over. Not much danger of that due to the excessive weight
> of the thing. The only issue I ever had was that I allowed the power cable to
> dip down into the oil. Over time, the oil wicked up into the cable until it was
> saturated. I didn't catch it until oil started seeping out of the plug! I
> replaced the power cord and stripped the jacket back far enough so that it
> didn't touch the oil. That fixed it.
>
> Unfortunately, this neat little PSU was sitting on my garage floor when Katrina
> came along. It was immersed in 2 feet of muddy, salty water. I threw it away
> in disgust, along with most of my furniture and appliances. I have some spare
> ammo cans however, and a small collection of MOTs. Perhaps I'll build another
> one someday.
>
> Greg
>
>
> --- On Thu, 10/23/08, jhowson4@xxxxxxxxxxx wrote:
>
> > From: jhowson4@xxxxxxxxxxx
> > Subject: Re: [TCML] MOTS
> > To: "Tesla Coil Mailing List"
> > Date: Thursday, October 23, 2008, 5:56 PM
> > Those ammo cases are a really good idea.
> > Where did you get feedthrough insulators like that and how
> > did you seal them to the case.
> > -------------- Original message --------------
> > From: G Hunter
> >
> > > If you wish to run two MOTs for about 4200VAC, then
> > place the secondaries in
> > > series with both cores grounded. Take the HV output
> > from both MOT HV output
> > > lugs. If you want to use 120VAC input, place your
> > primaries in parallel, but
> > > 180 out-of-phase. If you wish to use 240vac, then
> > place your primaries in
> > > series. Assuming the two MOTs are reasonably well
> > matched, they will divide the
> > > 240vac between them so each primary only sees 120vac.
> > Again, make sure the
> > > primaries are oppositely phased.
> > >
> > > A US military .30 caliber (7.62mm NATO) steel ammo can
> > makes a sturdy, cheap,
> > > oil-tight container. Pawn shops, Army surplus shops,
> > and flea markets have
> > > zillions of them. Two MOTs will just fit in there, so
> > you won't need too much
> > > oil. Worked well for me anyway:
> > >
> > > http://hot-streamer.com/greg/MOTDOC.htm
> > >
> > > and
> > >
> > > http://hot-streamer.com/greg/Mark_III.htm
> > >
> > > Cheers,
> > >
> > > Greg
> > >
> > >
> > > --- On Wed, 10/22/08, jhowson4@xxxxxxxxxxx wrote:
> > >
> > > > From: jhowson4@xxxxxxxxxxx
> > > > Subject: Re: [TCML] MOTS
> > > > To: "Tesla Coil Mailing List"
> > > > Date: Wednesday, October 22, 2008, 5:14 PM
> > > > ok. I just wasn't sure if there were any
> > benifits to
> > > > disconnecting it from the core.
> > > > i am assuming that to run 2 together to get about
> > 4kv i
> > > > should connect the cores together. giving me 2 HV
> > outs.
> > > > should I connect the primary's in series or
> > parallel. i
> > > > already know about how to match the phase by
> > reversing a
> > > > primary input in necessary.
> > > > Before i do that though i have to find a way to
> > put these
> > > > in oil. any suggections for a container that
> > could be
> > > > sealed up nicely. with the help of epoxy or
> > something else.
> > > >
> > > > -------------- Original message --------------
> > > > From: G Hunter
> > > >
> > > > > Should what be removed? Do you mean remove
> > the HV
> > > > winding, or remove the core
> > > > > connection?
> > > > >
> > > > > Regardless, don't remove either one of
> > them. Just
> > > > leave the MOT alone and take
> > > > > your HV off the single HV lug. This worked
> > for the
> > > > magnetron tube supply in the
> > > > > oven, and it will work for you too. The
> > return path is
> > > > through chassis ground to
> > > > > the MOT core. A picture is worth 1000 words,
> > so see my
> > > > MOT schematic:
> > > > >
> > > > > http://hot-streamer.com/greg/MOT_chat.htm
> > > > >
> > > > > No need to re-engineer your MOTs. They can
> > drive your
> > > > vacuum tube or tubes just
> > > > > as they are.
> > > > >
> > > > > Greg
> > > > >
> > > > >
> > > > >
> > > > > --- On Wed, 10/22/08, jhowson4@xxxxxxxxxxx
> > wrote:
> > > > >
> > > > > > From: jhowson4@xxxxxxxxxxx
> > > > > > Subject: Re: [TCML] MOTS
> > > > > > To: "Tesla Coil Mailing List"
> >
> > > > > > Date: Wednesday, October 22, 2008, 3:04
> > PM
> > > > > > ok. so leave everything alone. sounds
> > good to me.
> > > >
> > > > > > What is the best way to connect
> > everything
> > > > together for TC
> > > > > > use? I noticed that one of the HV
> > windings is
> > > > connected to
> > > > > > the core. should that be removed.
> > > > > >
> > > > > > thanks,
> > > > > > Jay Howson
> > > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
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>
>
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