Re: Help, to much power draw with MMC

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

Original poster: "Shaun Epp by way of Terry Fritz <twftesla-at-qwest-dot-net>" <scepp-at-mts-dot-net>

Well my variac is OK, and I borrowed a higher current one from work just in
case.  I tried connecting one half of the cap bank (0.0106uF) instead of the
full bank and the currents jumps up past full scale ( a measly 5 amps)
before the volt meter even has a chance to move, wow, I guess I must be
closer to resonance that I was before !!   ;-)  I also tried to measure the
inductance of the secondary, again with a borrowed meter,  it wavered around
between 25.5 mH and 32 mH, must be some sort of interference.  Then I put
the top load (torriod) on top hoping that it might shield the coil,
electromagnetically,  it did alittle, the readings wavered from about 27.5
to 29.5 mH ,  Wintesla stated that my coil should be 30 mH  so reality is
about right.  Anyway I'm rambling about my experiments.

Thanks,
Shaun Epp

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, March 30, 2002 1:04 PM
Subject: RE: Help, to much power draw with MMC


> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jim-at-jlproduction-dot-com>
>
> This may sound dumb but I had a similar condition going on
> when I had my Variac wired incorrectly. Apparently it can act as a
> voltage multiplier as well as just voltage control and that is what was
> going on.
> Anything above about 50 on the dial and everything hummed. Any higher
> setting than that, and wisps of smoke were seen!!
> Check your actual voltage with a multimeter and see what it is.
> Jim
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Friday, March 29, 2002 8:18 PM
> To: tesla-at-pupman-dot-com
> Subject: Help, to much power draw with MMC
>
> Original poster: "Shaun Epp by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <scepp-at-mts-dot-net>
>
> Help guys,
>
> I just finished my MMC, readjusting my safety gaps, and other projects.
> When I connect the cap bank (0.0215 uF) to the NST and filter set up the
> NST
> starts to Hum loudley and so does the the variac, it vibrates, I has a
> meter
> on it and past  50Vac and 5amps the loud humming and vibrating begins.
> I
> did this test to make sure the MMC withstands the voltage (  it better-
> two
> rows of 14 geek capacitors)  I measured the capacitors - sure enough
> 0.0215
> uF and 70Mohms resistance just like it should be.
>
> My variac, which is from a furnace control it only rated at 5 amp, so I
> bypassed the resetable fuse 8 - )   and I've pulled i'm sure 10 or so
> amps
> off of it.  Could this be a problems, generating harmonics ???  The
> other
> question is that I'm using a High power factor NST.  Its made by
> Allanson
> 12Kv  60mA   model 455B if that means anything.  Would the capacitive
> reactance of the MMC bank and that of the PFC built in  be causing the
> current to jump up like this and making my NST HUM??
>
> I'm not sure what's wrong, any Ideas!!
>
> Shaun Epp
>