Re: Helical primary question

To: tesla-at-pupman-dot-com
Subject: Re: Helical primary question
From: "Ed Phillips" <evp-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Sun, 19 Mar 2000 17:17:31 -0700
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Tesla List wrote:
> 
> Original Poster: CTCDW-at-aol-dot-com
> 
> Hello David,
> 
> My understanding is that with the many variables involved in the tuning of a
> coil, it is very difficult to build a coil with perfect tuning, and coupling.
> I recently tried an "off axis" tuning coil to add the inductance necessary to
> get the little 10/23 OBIT coil to tune. It worked very well I used a flat
> spiral of 9 turns, which wasn't enough, so I added 10 turns of the same size
> wire wound around a 3" form. It ended up tuning at the end of the 10
> turns....(whew!).
> 
> If you have the space for one, it worked for me!
> 
> Have fun!
> 
> Chris

	Of course, tuning isn't really very sharp or critical, once the
discharge starts and loads the blink out of the secondary.

Ed