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Re: [TCML] Wire gauge for large diameter secondary?



Do you have a source for this type of wire? 16 gauge seems a bit small based on this secondary diameter. Is this an insulated wire? What's the outer diameter?

The capacitor in this system is 0.1uF at 100kV and has a 14.4kV 15kVa Pig, so we're in the same range that you're thinking about. But a mil-spec wire is probably a bit high-brow for this build. I have available a 16 gauge MTW wire with a outside of 0.110". But 1000 turns of this would end up very tall. 800 turns would be 88" tall, which is probably very near the current setup.

Conor


----- Original Message ----- From: "DC Cox" <resonance@xxxxxxxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Sunday, October 03, 2010 6:15 PM
Subject: Re: [TCML] Wire gauge for large diameter secondary?


For this larger size coil use only Mil-D 3.5 kV wire, approx. 16 AWG.,
closewound, 34" to 40" toroid. Asynchro sparkgap, belt driven, 16 elec., running 400 pps. Excellent performance. around 10-15 kVA with 0.12 to 0.18
uF cap, 80 kV.

Dr. Resonance

On Sun, Oct 3, 2010 at 4:08 PM, <ConorPerry@xxxxxxxxxxx> wrote:

I'm trying to help someone with a 20" secondary which is starting to fall
apart.  It's space wound, probably 20-22 gauge wire, and the windings are
seperating from the PVC.  This has caused several locations of arcing
between windings and carbon tracking. All the modern coils that I've seen (12" and under) are tightly wound using the wire gauge size which will cause the correct winding lengths. But when you get into a secondary this large
what to do?  Is THHN, TFFN, or MTW suitable at all?  Is space-wound still
and option to help save on copper costs? If we do space-wound, what gauge
should be used?

Conor
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