Re: 12 inch coil

[FutureT-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

In a message dated 8/22/00 8:53:01 PM Pacific Daylight Time, tesla-at-pupman-dot-com 
writes:

> 
>  Original poster: "D.Wightman" <dwightman-at-mmcable-dot-com> 
>  
>  Hello everyone.. Recieved my 12 inch by 72 inch long secondary form. It is 
> made
>  of acrylic and cost 185 US dollars.. Here is the main question,, What 
guage 
> of
>  magnet wire should I use and how many turns. The power tranny is a
>  14400vac,,5kva pig..the caps are maxwell...i have heard that a ratio of 
4.5 
> to
>  1 would be good,, And 18 guage wire...

D,

If I were you, and if you have the room, I would leave the form at
72" tall, and wind the whole thing with wire.  I would use maybe
number 18awg wire close wound for about 1600 turns or so, or
maybe space wound a little.  Then I would run the coil at 120
bps with a sync gap and a huge toroid and a large cap, and it 
should outperform most other coils of it's kVA rating.

Cheers,
John Freau


My last coil was 8 inches in diameter 
> and
>  wound with 888 turns of number 22 magnet wire,, it performed very well, 
with
>  suprisingly few primary strikes..With number 18 wire at 4.5 to 1,, I will 
> get
>  well over 1000 turns??..Do you think maybe I should go with number 16
>  wire...Who on the list has experience with a 12 inch coil??. also maybe i 
am
>  sort of getting gun shy here since i was so pleased with the performance 
of 
> my
>  8 inch coil that im stuck on the pretence that a coil should never go over 
> 1000
>  turns,,,hmmmm..Thanks
>