I've been playing with a small cone coil and tried these caps in place my old TCBOR oil caps, that are Very bulky.
The coil is 6.5" at base , 1.75" at top with winding length of 13.5" of #22 wire , 3" sphere on top .
Primary is 1" copper strap. With 7500/60 , .008mfd cap and static gap getting 7" - 8" max.
I may be a little under coupled ? as first turn of banded primary is 2" from first sec. turn .
I was going for the 'antique' coil look , but with a little work may do better ?
Dave
> Date: Tue, 9 Dec 2014 22:42:37 -0800
> From: evp@xxxxxxxxxxx
> To: tesla@xxxxxxxxxx
> Subject: Re: [TCML] Sprague 4000MMFD caps
>
> Forgot to check original note. These ARE the type I warned about - keep
> 'em cool!
>
> Ed
>
> david baehr wrote:
>
> >' Hockey puck' caps 30kv, about 2 5/8" x 1 1/2" size . Using on a 7500/60 neon right now, may move up to 9000/60.
> >
> > How much abuse can these take ? I'm guessing heat is a concern. Working well on small coil now. Short runs . Maybe someone here has used them and can comment.
> >
> > 4000MMFD is equal to .004 mfd. ? Thanks, Dave
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla