RE: Stacking MOTs

["LOCKWOOD, Chris J." <clockwood-at-orbeng-dot-com.au> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

I fried ONE MOT the other night through insulation breakdown. No safety gaps
on my coil, but the destructive arc was started by a secondary strike right
onto the MOT secondary windings...

The few MOTs I've seen have thin insulation on the inside layers- they can
be since the voltage relative to ground increases as the windings move
outwards. Normally the inner winding connection is grounded. I suspect that
applying 2300VAC to the inner winding would kill the insulation rather
quickly, if it survives at all...

regards,

Chris

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Tuesday, August 29, 2000 11:43 AM
To: tesla-at-pupman-dot-com
Subject: Stacking MOTs


Original poster: "Richard Kircher" <richard.kircher-at-worldnet.att-dot-net> 

Hi All,
	Has anyone figured out how many MOT HV secondaries (about 2100 volts
each)
can be connected in series with the primaries connected in parallel to the
120 VAC line?  It would seem that primary to secondary break-down would
occur for those secondaries on top of the stack.  Does anyone have any
tricks for doing this like floating the primaries above ground some how?

Dick




----------------------------------------------------------------