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Re: PVC Wire for a secondary?


I've used 3 KV PVC insulated wire for a secondary for a big coil
that I built about 10 years ago.  It was a 20" dia. x 45" winding
length (about 50" for the overall form).  It was 14 Ga. stranded
and had a total of 262 turns.  This may break all the rules (very
high Q, few turns, high primary currents, and a 7/8" thick very
heavy secondary form that was PAINTED BLACK) but it
produced solid 12 foot sparks.  It had 5 acrylic disks down
the middle and to the horror of many people, I brought the wire
to the HV terminal INSIDE the form.  I urethaned and filled in
the space between the wires, and sanding between coats, the
secondary to the point that it was very smooth surface (about
40 coats of urethane.  One of the great benefits from doing all
this was that there was absolutely no corona from the top turn
of the secondary coil - everything worked great!  I bet that you'd
have great luck using the PVC wire.  Go for it!

David L. McKinnon
D&M's High Voltage

----- Original Message ----- 
From: Tesla List <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, June 09, 2000 3:19 PM
Subject: PVC Wire for a secondary?

> Original Poster: "David Mills" <dave-at-g7uvw.freeserve.co.uk> 
> Hi all,
> Are there any major disadvantages in using PVC covered wire for a
> secondary.
> The only problem I can forsee is that the capaciance of the secondary
> will be altered due to the thicker wire insulation spacing the turns out
> more.
> Any ideas / anyone done this?
> Cheers
> Dave