Re: Greg's MOT New Stack (artwork, ballast explanation, etc.)

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

Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-paradise-dot-net.nz>

Hi Ted in NZ here

To clarify
I run 6MOT's total
2 Pairs of 3 around centre gnd (usual config)
The variac can run just one side of the system with the other direct off
mains. I can do this after I've got the beastie tuned with the variac
running both sides. I do not run only the outer MOT's off the variac.

I run 11mH ballasting on both groups of 3 MOT's

The outer MOT's are in quality xfrmr oil.

Tnx for the MOT page.

Next activivty is to run ARSG
Best
Ted L
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, September 14, 2002 7:53 AM
Subject: RE: Greg's MOT New Stack (artwork, ballast explanation, etc.)


> Original poster: "Dave Hartwick by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <ddhartwick-at-earthlink-dot-net>
>
> The isolation of the outer transformers can be improved by driving them
with
> back to back MOTS.
> This effectively increases the air path length between windings and cores.
> I ran a bank of 6 in 1999 like this without oil immersion. 10 MOTs were
> used.  I think New Zealand Ted drives only the outer MOTs with a variac,
the
> rest driven directly by 240 V service.
>
> Is anybody ballasting their MOT supplies? I'm not sure I understand the
> necessity of the huge capacitances. Problems with power arcing? Perhaps
MOT
> power is stiffer than even Pole distro xfmr power? I would think some
series
> resistance on the HV side would help.
> Dave H
>
>
> Original poster: "Andy Cobaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <kb3ewy-at-rcn-dot-com>
>
> Check out my recently (3 days ago) uploaded page on MOT power supplies:
>
> http://users.rcn-dot-com/tcobaugh/motpsu.htm
>
> It still needs a lot of info, but links to all of the known diagrams are
> there for 4, 6, and 8 pack MOT PSUs.
>
> Cheers,
>
> Andy C.
> Internet Homepage: http://users.rcn-dot-com/tcobaugh/
>
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