dr.hankenstein at earthlink.net
Wed Apr 7 23:16:17 MDT 2010
If you're not too sure on the effects of a good coating (or two or
three) of varnish; please refer to a scientific evaluation on the
This should remove all doubt that varnish does more than just hold the
winding in place and end the hypothetical armchair speculation. Dr.
Spark has at least 80 coats of varnish on "Fatboy"---13+ footers out of
a 4 foot secondary proves it: http://www.drspark.org/fatboy1_rebuild.htm
From: tesla-bounces at pupman.com [mailto:tesla-bounces at pupman.com] On
Behalf Of Gary Lau
Sent: Wednesday, April 07, 2010 1:18 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Lacquer
I'm not sure there is any electrical benefit to coating the secondary
coil. Coating does not inhibit corona or racing sparks. If you hold
any conductive object near the secondary, it's going to arc through
any kind of coating, so just don't do that. The only benefit to
coating is mechanical protection against abrasion, and aesthetics.
The most common coating is oil-based polyurethane, which sticks better
than the water-based flavor. There are other formulations made for
applying a thick clear coat to table tops, that reportedly also work
well, but I've not personally tried these.
Regards, Gary Lau
On Wed, Apr 7, 2010 at 3:43 PM, Thomas Schmit <Thomas.Schmit at cern.ch>
> What do you folks use for the lacquer on the secondary coil? There are
special lacquers available at motor winding shops, etc that are rated at
something like 2000 volts per mil. They are a little bit pricey and was
hoping for an easier solution - i.e. something from Lowes, Home Depot or
other "big box" store.
> Any advice?
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