RE: quick n simple questions

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "S&JY" <youngs@xxxxxxxxx>

Mike,

Yes, MOTs usually have magnetic shunts in them.  But the current limiting
they provide is far less than for shunted NSTs.  NSTs can run with the
secondary shorted all day without overheating.  But MOTs will overheat if
you try running them with a shorted secondary, or even with more load than
they are rated for.

I suspect (others can correct me) the MOT shunts are more for adding a bit
of current regulation to the Magnetron, and probably to limit the initial
current surge of charging the level-shifter cap when power is applied, and
are not there to keep the output current within save limits the way a NST
does.

So, in my opinion, you are not going to gain much for the effort of knocking
out MOT shunts.  If you need more power, then adding a second MOT is usually
a better way to do it.
--Steve Y.

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Friday, March 23, 2007 9:12 PM
To: tesla@xxxxxxxxxx
Subject: quick n simple questions

Original poster: Mike <megavolts61@xxxxxxxxx>

Hi all,
   I recently dissected a small microwave oven (500W).  This lil MOT
might come in handy, but it's definitely current limited by
shunts.  There appears to be 8 on each side of the core.  The
question is...if I want to beef this lil critter up a bit,  how many
would you suggest I remove?  One other question is...do I keep the
remaining ones together or spaced and if together,  do I wedge them
up to the primary coil or keep them centered between the coils?
Mike