RE: PLL-controlled SSTC?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ray Haynes by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ray.haynes-at-attbi-dot-com>

Search the archive for Ken Herrick's SSTC. I believe his coil does work
in a PLL fashion. It has a CW mode where the frequency is controlled by
the current at the base of the secondary which makes it self tuning.
When you draw an arc you can hear the frequency change as you change the
length of the arc.

Ray Haynes
Antelope, CA

> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Friday, July 05, 2002 11:48 AM
> To: tesla-at-pupman-dot-com
> Subject: PLL-controlled SSTC?
> 
> Original poster: "Jolyon Vater Cox by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
> 
> 
> Has anyone experience of the use of Phase-Locked-Loops to keep a Tesla
> coil in
> tune? This approach would appear to have advantanges in combining the
> efficiency of Class D switching with the frequency-tracking capability
of
> a
> self-resonant inverter -are there any serious problems with this
approach?
> Also, is dead-time control actually essential for switching
> transistors/MOSFETs
> in Tesla coil service?
> 
>