Re: [TCML] PVC insulated wire

["David Rieben" <drieben@xxxxxxxxxxx>]

Hi Terry,

Yes, the modern day school of thought does seem to dictate 
1000+ turned secondaries. However, I have seen plans for 
some coils from older publications that had only a few hundred
turned secondaries. As a matter of fact, I seem to recall the
Griffith Park Observatory coil (and its replica at the Mid-Ame-
rica Science Museum near you in Hot Springs, AR) having a 
secondary in the neighborhood of 300-400-ish? turns. The only 
possible drawback that I can see is the less dense turns/inch will
yield a smaller total secondary inductance than a secondary coil
of the same deminsions with higher turns/inch and maximum prac-
tical secondary L is one thing that we generally do strive for in 
coil designs for longer sparks. Otherwise, I can't see any reason 
why the PVC insulation covered wire wouldn't work.

David


----- Original Message ----- 
From: "Terry Oxandale" <Toxandale@xxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Tuesday, May 13, 2008 5:14 PM
Subject: [TCML] PVC insulated wire




Could I prompt some advice about using 18 AWG PVC coated stranded wire
for a secondary. It will be wound on a 15" form, approximately 62". The
wire diameter with insulation is .090, so obviously I will get at best
11 TPI. Initially is seems contrary to the popular "best practices" use
of 1000+ turns.

Terry
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