Re: coilform size and AWG wire wize

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi D.C.,

I'm running a very simple 12/60 operation with a variac for mains 
voltage control. I can turn the variac up to 140 Vac with best 
sparks. I've had this coil run "not the greatest" in the past with 
misc. topload configurations, tuning, coupling, etc. I rebuilt the 
primary (same as before) and set the tap to Javatc (no special tuning 
beyond that). What I have done is reduce the primary C to 0.0188 uF 
vs a previous 0.025 uF. A simple vacuum static gap.

I'd show you pics, but apparently my batteries have been stolen by, 
"TEENAGERS"; ARGHHHH!!!

Take care,
Bart

Tesla list wrote:
> Original poster: "D.C. Cox" 
> <mailto:resonance@xxxxxxxxxx><resonance@xxxxxxxxxx>
>
>
>
>
> Bart:
>
> Are you running a 12 kV 30 mA or 60 mA xmfr with this setup?  Sounds 
> like a very nice coil.
>
> Dr. Resonance
>
> > Original poster: "Barton B. Anderson" 
> > <mailto:bartb@xxxxxxxxxxxxxxxx><bartb@xxxxxxxxxxxxxxxx>
> >
> > As mentioned my sec is 4.5" x 21.8085" wound with 24 awg. It's 895 
> > turns (had to remove 5 turns due to a pin point breakout right at 
> > the top a few weeks ago when testing other primary configurations). 
> > My topload is 6.25" x 21". It's operating excellent right now using 
> > a static gap (1.25" x 3" copper tubing with .05" spacing between 6 
> > tubes, 0.25" total). It's a vacuum gap. I've found the copper 
> > tubing to be superior to the solid brass which contradicts my 
> > statements in this area previously. The guys talking about thermal 
> > superiority using the copper tubes were correct. So out with the 
> > brass. Sure looked nice though.
> >
> > Coupling is 0.129. The bottom sec winding and flat primary are even 
> > on the same plane. Free-air spark lengths are around 54" and my son 
> > mentioned a couple days ago that it's the smoothest running coil 
> > he's seen me build. This coil is also wound on a black pvc tube. 
> > Cap size is configured for 0.0188 uF and the inner primary is 1.48" 
> > from secondary (1/4" tubing, 1/4" spacing edge to edge tapped at 8.4 turns.
> >
> > Take care,
> > Bart