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Re: [TCML] MOTS
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:
--- On Wed, 10/22/08, jhowson4@xxxxxxxxxxx <jhowson4@xxxxxxxxxxx> wrote:
> From: jhowson4@xxxxxxxxxxx <jhowson4@xxxxxxxxxxx>
> Subject: Re: [TCML] MOTS
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> 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 <dogbrain_39560@xxxxxxxxx>
> > 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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