Re: Secondary Wire Gauge

• To: tesla-at-pupman-dot-com
• Subject: Re: Secondary Wire Gauge
• From: "Ed Phillips" <evp-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sat, 22 Apr 2000 16:13:09 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>  Original Poster: "Joe Thuss" <jbthuss-at-execulink-dot-com>
> 
>  What is a good rule of thumb when choosing the wire gauge to wind your
>  secondary with.
>  My power supply is a 9/30 NST and a 10/23 OBIT. For the secondary form
size I
>  am thinking something like 3.5" diameter and 15" long. Thanks in advance for
>  the help.
>  Simon
>   >>
> Joe,
> 
> I used #28 wire on my 3.5" diameter coil, with a winding length of 13".  Your
> winding length of 15" sounds like a good plan.
> 
> Ed Sonderman

	I have a similar small coil here.  Core is heavily-shellacked (sp??)
cardboard mailing tube, 3.17" OD with close wound #28 heavy formvar
about 15" long.  Get about 24" sparks running from 9 kV, 60 ma
transformer, 0.006 mfd of ceramic filter capacitors (get hot after a
minute or so) and a 3" by 14" toroid.  Not spectacular performance, but
fits in the attic nicely and impresses unsophisticated visitors who have
never seen what a REAL coil will do!

Ed

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