TSSP: List Archives

From: "Barton B. Anderson"
Date: Wed, 15 May 2002 23:22:02 +0000
Subject: Re: [TSSP] Racing arcs

Hi Paul,

Later tonight measured the following:

Primary tank w/out resonator = 61.3kHz.
Modes scoped w/signal across gap (all kHz): 35.4, 69.8, 119.7, 414.

Bart

"Barton B. Anderson" wrote:

> Hi Paul,
>
> My measurements last night were with the toroid at 70" (center of
> toroid). Remember that I had lowered it from 77" and got rid of the
> racing arcs. Tonight, I tried to get back to square one by mounting the
> toroid back to the original 77", but of course with the turns removed
> from the bottom, coupling was lowered and I didn't get racing arcs. Here
> are measurements with toroid at 77" as the coil is now.
>
> Fres (w/toroid in place, w/pri at tap 14) = 69.8kHz.
> Flow (63% amplitude below Fres) = 68.3kHz
> Fhigh (63% amplitude above Fres) = 70.1kHz.
>
> Primary tap at 14 (remeasured OD = 30.94", ID = 11", both at centers).
> Primary tap inductance measured (no secondary in place): 106uH.
>
> After these measurements, I ran the coil again with 180VAC input. There
> were no racing arcs and the coil ran ok. Quantity of sparks were 2 to 3
> at a time (sometimes 1). The sparks were of the thin type (compared to
> the thick white arcs when the toroid was at 70" and higher coupled) but
> they reached the wall easily (just enough to current to allow breakout.
> Allowing more current brings the sparks to an unsafe distance. I'm only
> 8 feet away). Sparks breakout slightly above center of toroid.
>
> Regarding the coupled mode frequency's. Should I be doing this with
> everything hooked up and gap shorted? This is easy enough to do (their
> there, just want to be sure of connection).
>
> I think it would be a good idea to measure the primary freq without the
> resonator system in place. I'll try to do that tonight at some point
> just for the fun of it.
>
> Take care,
> Bart
>
> Paul wrote:
>
> > Bart wrote:
> >
> > > Specs have changed
> >
> > OK, not a problem.  I have a script which gathers all the data and
> > assembles it into the web page
> >
> >  http://www.abelian.demon.co.uk/tssp/cmod/
> >
> > so it's no problem to alter any of the measurements, or to add
> > new coils.
> >
> > I'd like to make the model's representations of these four
> > coils more accurate, by double checking the primary coil
> > measurements, and measuring the respective resonant frequencies.
> >
> > If possible it would be nice to measure the coupled mode frequencies
> > too.
> >
> > I'll update the above web page in a few hours with your new numbers,
> > and with John's bigger toroid.
> >
> > --
> > Paul Nicholson,
> > --


Maintainer Paul Nicholson, paul@abelian.demon.co.uk.