Re: Continuously variable primary

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Scott Hanson" <huil888@xxxxxxxxxxxx>

Ken -

One of the coils at the '01 Nor-Cal Teslathon had a similar 
arrangement for adjusting the primary L. I don't remember if
it was set up Saturday or Sunday, but the secondary got toasted by a 
huge flashover/racing arc during the initial attempt to run the coil. It was
somewhat similar to your proposal, but used a grooved roller to ride 
the copper-tube primary. I think the entire primary coil was rotated 
via a gear motor, and the roller
arm was fixed. I've got photos somewhere ........ (pre-digital camera 
era for me).

Regards,
Scott Hanson

riginal Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, May 25, 2006 2:11 PM
Subject: Re: Continuously variable primary


> Original poster: "K. C. Herrick" <kchdlh@xxxxxxx>
>
> I'll prevail on Terry to re-post http://hot-streamer.com/temp/TCHTUNE.JPG,
> embellished a bit from yesterday.  I've added stiffening flanges on the
> contact-carrier and springs to provide contact pressure.  Plus, a few
> misc. other changes (including a color change from the inadvertent yellow:
> to get it into jpg I have to screen-save in pcx, then invert all the
> colors, then save to jpg in the new colors).
(SNIP)