Re: MOT problems/strange MOT?...Please Help!!

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

Original poster: "Mike Waddick by way of Terry Fritz <twftesla-at-uswest-dot-net>" <Mikew-at-winternet-dot-com>



> Original poster: "Hans Scholze by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <hanscs-at-eagle.ptialaska-dot-net>
>
> Mike,
>
> >From what I can tell, those extra wires are for a low voltage/high
current
> winding that drives the filament of the magnatron.  I have a couple of
MOTs
> like this and I just leave the extra winding disconnected.
>
> Hans
>

Hans,

I removed the filament windings so they are not there any more. These
Windings are HV. They both arc to the core. I have not been able to figure
out these MOTs but i belive i have got the supply working. I think the key
is to not GND the middle of the diodes to the core. I got longer arcs when
they were not connected.

Thanks alot,

Mike Waddick




>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Sunday, February 25, 2001 8:07 AM
> Subject: MOT problems/strange MOT?...Please Help!!
>
>
> > Original poster: "Mike Waddick by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <Mikew-at-winternet-dot-com>
> >
> > Hello all,
> >
> > I am currently working on a dual MOT power supply with voltage
> doublers/level
> > shifters. The mots i got i have no specs on, but i got a mesured output
> voltage
> > of 2kv, this seems about right. the Two Mots are exactly the same and
they
> run
> > at the same voltage. The cores are hooked together as ushual. For my
level
> > shifter i used two 2100v 1uf MOT caps on each leg of the mots and i used
2
> > strings of 22 1n4007 diodes. It is set up just like every other MOT
power
> > supply out there. One thing that seems to be alittle different from each
> design
> > is the connection between the middle of the diodes and GND. I have it
> connected
> > to GND.
> >
> > Ok this seems all right doesn't it?
> >
> > Well one thing is my MOTS are alittle wierd, if someone has ever seen
this
> type
> > please give me alittle info. Well the MOTS are alittle wierd because
they
> have
> > three HV outputs. There is on to the core and there are 2 on the
secondary
> > windings. The ones on the secondary windings are kind of wierd. They are
> both
> > connected to the core and one has a resistance to the core of 60 ohms
and
> the
> > other has a resistance of 100 ohms. Between the two termianls there is a
1
> ohm
> > difference. If i short the two outputs on the secondary it starts to
burn
> and
> > gives some smoke, but the MOTS seem fine. They both are connected to the
> core.
> > I even have tryed connecting one of the outputs to the core, and all it
> does is
> > draw ALOT of current. I also mesured the output of both of the terminals
> to GND
> > and i got the same voltage. Can anyone explain these MOT's?
> >
> > The thing that seems to be very unushual is that i am only getting 3kv
per
> leg
> > after the level shifters. This doesnt seem right. That means the level
> shifters
> > are only giveing a 1kv increase. This is the same if the MOT's primarys
> are in
> > phase or out of phase. It makes no difference it still gives a final
> output of
> > 3kv per leg.
> >
> > I have tryed everything i can think of and i have asked everyone i know
> and i
> > have gotten responces from "that circuit isnt a voltage doubler"  to
"Your
> MOTs
> > are bad".
> >
> > So any help would be very helpful.
> >
> > Thanks alot,
> >
> > Mike Waddick
> >
> > <http://www.winternet-dot-com/~mikry>Http://www.winternet-dot-com/~mikry
> >
> >
> >
> >
> >
>
>
>
>