Re: MOT supply ballasting

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

Original poster: "Christoph Bohr by way of Terry Fritz <teslalist-at-qwest-dot-net>" <cb-at-luebke-lands.de>

Hello Matt.

I used 4 MOT caps in my former 4MOT-Supply and the advantage in higher
output voltage is really obvious.
But I wonder, if one could build a better inductive limiter of some sort.
Most of the big and professional coils I have seen sofar, use a Variac as
variable inductive load.....wonder if the used transformers can deliver
higher voltages so that the effect is less bad.
Currently I use exactly the setup you describe and always wondered what the
voltage might be.....but 7KV sounds really disapointing to me :-(
Unfortunately I can't get hold of more MOT caps ( 8X 1µF / 2,1KV for a total
of 12pcs is what's missing to make it work )
But maybe there is a more effective way of primary current limiting....maybe
one could even "upgrade" the shunts in the mots.....maybe this will give a
more tamely kind of MOT supply ( the high current available can be really a
problem, 'though its fun anyway )
Has anyone ever tried this?

If can get hold of 12MO caps ( 3 at each leg, maybe 2 rows in parallel ? )
thats probably the best way to go.
Some other coiler advised me and it really was a big improvement with the 4
MOT stack, witch 6MOT's I couldn't try sofar.

Good luck

Christoph Bohr

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, June 30, 2003 1:15 AM
Subject: MOT supply ballasting


 > Original poster: "Matt Whitman by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <teslacoiler-at-hotmail-dot-com>
 >
 > Hello all. A while back there was some talk about capacitively ballasting
 > mot supplies. I was wondering if anyone has had any success with this and
 > how do you wire it up. I have a six pack mot supply that is inductively
 > ballasted with two mots in parallel and their secondaries shorted. This
 > limits the current to 340ma but also limits the voltage to around 7kv,
which
 > is about half what it could output. Suggestions and  comments would be
 > greatly appreciated.
 >
 > Matt Whitman
 > teslacoiler-at-hotmail-dot-com
 > http://web.a-znet-dot-com/~teslacoiler/index.html
 > KC2IEV
 >
 >
 >
 >