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Re: MOT - PSU
Hi Reinhard, all
I'm building a TC with MOT's also, but still can't seem to fix my problem of
blowing my 16A fuses
When I measure it I see that it is taking 40-50Amps from my wall socket
before blowing my fuse :-((
I've got 2 MOT's (different ones, since identical ones are hard to find)
connected the primary's of the MOT's in parallel, and the secondary's in
series
It doesn't matter if I switch connections of the primary, still the same.
When I take one of either of the MOT's , it works fine, but
together.........POW.
Each one of the MOT's alone takes a normal 6.6Amps, and it's own limiting
works just fine when it is on it's own.
----- Original Message -----
From: "Tesla List" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, March 12, 2000 1:52 AM
Subject: Re: MOT - PSU
> Original Poster: "Reinhard Walter Buchner" <rw.buchner-at-verbund-dot-net>
>
> Hi Herwig,
>
> > Original Poster: "Herwig Roscher" <herwig.roscher-at-gmx.de>
> > Hi fellow MOT coilers,
> >
> > For my new VTTC unfortunately I havn't found a
> > suitable plate xformer yet. Therefore I'm
> > thinking of using a couple of MOTs instead. My
> > YU-204 tube is intended for pulse use and will
> > require more than 2.5 kVdc I can get out of the
> > 1.8 kVrms MOTs used in this part of the world.
>
> Snip.
>
> Try looking for bigger microwave ovens with Gardner (U.K.)
> MOTs. These put out 2.3kV at 650mA rated (measured,
> too). Antiparallel both on the 230V side and series the two
> on the secondary side. Center tap the connection coming
> from MOT #1 and going into MOT#2 and ground it. That
> way, you will get 4.6kV-at- 650mA (making ~3kVA) without
> overvolting the secondaries of the MOTs. These Gardner
> MOTs are up to the job and their insulation is better than
> most of the MOTs, I have seen. If you want to go to the
> trouble to build a set of two (meaning 4 MOTS) isolation
> xformers you could use 4 of these Gardner units to get
> 9.2kVAC at 650mA (~6kVA). That should give your VTTC
> a smokinŽ (pun intended) hot output. Actually, I have run 4
> of these in series w/o isolation xformers and they held up
> beautifully in air. There was no corona to be seen in the
> dark. A 5th one in series (NOT of the Gardner type) didnŽt
> last long, before it arced to the core (not surprising).
> However, even then, the Gardner MOTs did NOT arc over
> or die.
>
> The only problem is FINDING these brutes, but maybe
> youŽll have more luck than I did ;o))
>
> Coiler greets from (and back to) Germany,
> Reinhard
>
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