Re: COMMENT ON USE OF WOOD IN TC'S

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Teslacoil Workshop" <workshop@xxxxxxxxxxxxx>

TCers...

The ETL specification for public Tesla coil installations that we helped
write allows for wood in certain parts of a TC. Acceptable wood varieties
include Baltic Birch, Red Oak and Sitka Spruce, all kiln dried and HV coated
with 5000v insulation and no less than 2" from the nearest HV conductor.

I used Nikola Tesla's own research as well as electrical trade union
publications published before the widespread of plastics to lobby the
testing laboratories and the County of Los Angeles to accept wood. We
believe that in certain circumstances, wood can outperform plastics in HV
R.F. uses. The reason stems from the way plastics are manufactured as
opposed to the way wood is grown. It could be the non-monolithic surfaces or
the trapped air content of wood that gives it it's edge.

Jeff W. Parisse
Director, kVA Effects
www.teslacoil.com



----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, October 03, 2006 3:22 PM
Subject: COMMENT ON USE OF WOOD IN TC'S


Original poster: Ed Phillips <evp@xxxxxxxxxxx>

     I've found it a good idea to dry the wood in
the oven (before final finishing to size, to take
care of warpage as it dries and shrinks) at 250°
for a few hours and then, after finishing, coat
it with a couple of layers of shellac (I happen
to prefer orange because that's what a lot of the
old timers did) or Urethane varnish.  I've never
had any HV problems (at primary circuit voltages of course).

Ed