Re: 4 pack MOT! wowsa!

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

Original poster: "Christoph Bohr" <cb-at-luebke-lands.de> 

Hallo Eric.


Gratulations to your success and your free HV isolator you found.
Of course it sometimes is hard to put such an unconvetional and big piece to
a good use.
But you might remove that long metal part at the lower end and modify the
upper wire connection and
use it to support your toroid above the secondary coil.

 > The 4 pack MOT has it problems such as insane current draw(60 Amps!),
 > can I
 > ballast it with a MOT in series with it

you can use one ( ore more in parallel ) MOT's primary in series with your
supply input and short the secondary of the limiting MOT,
this should bring you into the 1-2KVA range depending on size of the MOT
used to limit the current.

 >temporarily or how about a 60 KVA
 > 470 pf russian transmitter cap on  each 5000 volt output?

I am not sure if this type of cap can handle this, but the values ( I assume
60KVA is upposed to be 60KV )
sound reasonable. I used 2 seriesed MOT-capacitors on each HV leg in series
and these worked great, especialy in
respect of the lower voltage drop ( even some rise does/can occour here as
far as I know )

 > Also how can I
 > better insulate(or more correctly, insulate period) the transformers which
 > are second in line? I have ceramic insulator s but they would break off
too
 > easily.

 >From what are you trying to insulate the transformers from? from the
baseplate you use?
Or from arcing over internaly? Many people use the outer MOTS in oil or ( my
choice )
all under oil. This helps cooling a lot. The heat abstraction  from the
outside of a tranformer into air is pretty
bad. I use 6 MOTs under oil and everything works fine although my wiring is
pretty thin.
Of course this adds a lot of wight and may lead to a mess if not done
correctly.
Another thing is to disconnect the inner end of the secondary from the cores
to leave them floating.


However, good continued succes, you have now a supply with great power
capability.

Regards

Christoph