[TCML] PVC insulated wire

[bartb]

Hi Terry,

Your looking at about 688 turns at best. I'm not so down on stranded 
wire as I am on turns. It would be nice to increase the turns nearer to 
1000, even if that meant smaller gauge stranded wire. The coil will work 
with 700 turns ok, but a few hundred more turns would be better for 
performance in my experience. If you keep it as a 700 turn coil, you 
should throw some large power in order to get decent spark lengths.

My first coil was 18g solid at near 700 turns. This coil did much better 
after I added turns nearer to 1000 (advice from the TCML). This is just 
my experience and observation. If it's wound already, then hell, give it 
go and see how it performs.

I probably should mention: My "very" first coil used 18g with large 
insulation (5kv hv insulation). Only 200 hundred turns or so. I wound 
the dumb thing just prior to finding the TCML. After I found the TCML, I 
discussed the coil and realized my ignorance and the major flaws. I took 
their advice and rewound with solid magnet wire (18g which ended up at 
700 turns). The low turn thing came up later after first light. It 
worked, but not great. In order to get it working "great" I ended up 
building my tungsten SISG and adding another foot or so to the coil to 
increase turns and h/d. Then, all was good! The list advice was right on 
the money!

Take care,
Bart


Terry Oxandale wrote:
> 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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