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RE: the back of secondary winding
Original poster: "JT Bowles" <jasotb@xxxxxxxxxxx>
Let me tell you, varnish is always a good idea when deal with
voltages above 600volts, in confined spaces.
My secondary has 30 layers of varnish on it, yes people 30 layers. It
was spun dried, and now lightning itself cannot penetrate the varnish.
The point of insulating the secondary:
*is to reduce the risk of turn-to-turn arcing
*prevent damage done by flashovers
*prevent damage done by breakouts in middle of secondary
*prevent damage done by primary-to-secondary strikes
*keep humidity away from HV windings
*lastly, help supress corona, which eats away the natural enamel on the wire.
Insulating your secondary is not rubbish.
The process you described is pretty much how it is done. Oftentimes,
it takes days to fully cure the enamel on a coil(mine took all sunday).
good luck, and have fun coiling
From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: the back of secondary winding
Date: Mon, 26 Jun 2006 09:40:43 -0600
Original poster: Russell L Thornton <Russell.L.Thornton@xxxxxxxx>
Would someone kindly explain to me the process and purpose of
varnishing the windings of the secondary? Specifically, it seems to
me that when we are varnishing the coil form raw and letting that
cure and then varnish again after we wind the wire then the back of
the wire still remains vulnerable with just the enamel insulation of
the wire. Of course this assumes close spaced winding. Or am I
just not seeing the purpose of this exercise. If we were doing this
for insulation purposes I would like to put a layer of varnish on
the form mounted to the winding mechanism and while still wet wind
the wire. What's up here?
Russ,
Monitoring Lightning at the Cape
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