Re: MOT supply problem

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

Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>" <youngs-at-konnections-dot-net>

Too much drop across your ballast?  4 MOT primaries in parallel is a fairly
low impedance, and the cores tend to saturate near full voltage, causing
your MOTs to draw 10-15 amps open circuit.  Try an AC voltmeter across your
primaries to see what your actual primary voltage is.  You may need to
reduce the inductance in your ballast.

--Steve Young
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, August 26, 2002 12:09 AM
Subject: MOT supply problem


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<A123X-at-aol-dot-com>
>
> My coil is pretty much completed with an async rotary gap, .1uf MMC, 6" by
> 28" secondary, and 22" by 6" flex duct toroid. Also I have an MOT supply
> consisting of 4 MOTs in series with the center grounded and limited by an
> inductive ballast to 1800VA. The problem I'm having is that they don't
seem
> to be putting out as much voltage as they should be. When the MOT's are
> hooked up with thier outputs across a gap between two bolts they can't
jump
> as far as a 7500v transformer can. In fact they weren't even jumping the
gap
> that the 7500v transformer could with only 95v input which would mean
around
> 6,200v output. I know they're phased properly and I don't think anything
is
> wrong with any of the individual transformers so what could be causing
this?
>
> Mark
>
>
>