Re: Twin Mots

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

Original poster: "Dale Nassar by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dnassar-at-i-55-dot-com>

How many kVA (or Amps)?  I have one that is 3000V -at- 2kVA--big--over 650mA -at- 
over 4000 VDC.  You ought to see the magnetron!  Also, It had a 70A 
filament transformer and a FWB rectifier.  The FWB was wired in a way I 
have never seen before--two of the four leads were criss-crossed making the 
four-terminal device into some kind of 'paralleled' two-terminal device--I 
have the schema here somewhere.

Also I found a dual magnetron oven that was essentially two microwave ovens 
in one--the only (interesting) difference was that the MOT primaries were 
wired out-of-phase.  If you know how the standard pseudo-voltage-doubler of 
the typical microwave oven works, you can see that this is quite a neat 
efficiency trick.

====================================================

At 10:40 PM 5/24/02 -0600, you wrote:
>Original poster: "Steve White by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><slwhite-at-zeus.ia-dot-net>
>
>A prized microwave oven to look for on the scrap heap is any of the old
>Amana Radarange ovens from the 1970s. These things are huge and have a
>massive 4000 volt  MOT inside with huge diodes. I have the MOTs from 3 of
>these.
>
>Steve: Coiling in Iowa
>
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Friday, May 24, 2002 7:13 AM
>Subject: Twin Mots
>
>
> > Original poster: "Loudner, Godfrey by way of Terry Fritz
><twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>
> >
> > After collecting about 80 mots, I finally found two which are identical.
> > They have model number KM 450W and are from White-Westinghouse. The
>vintage
> > is 1977 and the oven is rated 115V and 14.5A. Rated at 2,800V, the
>secondary
> > coil is encased in green plastic. The 0.9uF cap is twice as big as normal
> > and the diode is 3/4" wide, 5/16" thick, 4.5" long. Not that a twin mot
>PSU
> > must have identical mots, I just wanted to report what a hassle it was to
> > find two mots with the same model number.
> >
> > By the way, I'm still working intermittently on a useful formula for the
> > self capacitance of an isolated toroid that does not breakdown over a wide
> > range of toroid sizes. It has become quite a mathematical project. I am
> > struggling to strengthen certain inequalities which would allow me to
> > complete the task. The capacitance of a toroid drops when placed on a
>tesla
> > coil, but I still enjoy the challenge of the isolated toroid.
> >
> > Godfrey Loudner
> >
> >
> >
> >