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>

Thanks for the tips guys,

Your right, I wasn't using a spark gap or primary coil,  just the MMC
connected to the NST through the Terry filter.  OOPS !!  I didn't know that
this was a no no.  Anyway I'm going to try half the cap bank just to satisfy
my curiosity, the pre tune with a signal generator and a scope meter, then
LOOK OUT WORLD !!  8 - ))     MUH HA HA HAAAA  -  I'm going to fire it up.

Thank you all for your help!
Shaun Epp.
Winnipeg, Manitoba, Canada

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, March 30, 2002 1:02 PM
Subject: RE: Help, to much power draw with MMC


> Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Gary.Lau-at-compaq-dot-com>
>
> You didn't say anything about a spark gap.  Normally, the sound generated
> by the gap would make it very difficult to hear a humming NST and Variac.
> But, if you don't have a spark gap for this testing (just the NST across
> the cap), this is an extremely *bad* thing for your cap and NST, and will
> result in high current draw, with painful groans from the NST and Variac
as
> you describe as the core saturates.  It's a bit like flooring the gas in
> neutral.  All that energy has to go somewhere.  The cap & NST will be near
> 60Hz resonance and the voltage will climb to a very damaging level.
>
> Regards, Gary Lau
>
> 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
>