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

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

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/