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Re: [TCML] MOT mystery arcing
Hi Scott,
I hate to be the barer of bad news but it sure sounds as if
your MOT(s) is/are in the process of dying. :^( Have you
considered submerging your MOTs in oil? This may help
to alleviate that problem. If possible, I would simply get
2 more undamaged MOTs and submerge them in oil pri-
or to use in your coil circuit.
Ground strikes tend to induce RF nasties into the ground
as well as nearby associated circuitry so that's like what's
going on with your setup. This is the reason that it is impor-
tant to keep the RF ground seperate from the mains ground.
David Rieben
----- Original Message -----
From: "Scott Bogard" <sdbogard@xxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Wednesday, July 28, 2010 9:57 PM
Subject: [TCML] MOT mystery arcing
Hey Guys,
So here is a new one that has me stumped... My 4-inch coil burned a
MOT (no uprise there) so I replaced it, to keep the coil from arcing to
the primary and capacitor etc, I hung a grounded wire off the base so
any downward reaching arcs hit it instead of the works (and it does the
job quite well.) Here is the bizarre thing, sometimes (most of the time
in fact) when it hits the wire, I see arcing in the MOT windings to
core, it started as high voltage secondary coil type arcing racing all
over, but over time the windings are actually catching fire inside on
one of the MOTs. I cannot believe but it is still running. None of the
wires were connected, I tried grounding the MOTS and nothing has
changed, I'm using only two, what is going on here? My base is wood
painted with black paint, and one MOT has shunts removed, the other
doesn't. I don't know what else to say, it's never done this before...
Scott Bogard.
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