Re: Toroid Testing
Tesla List wrote:
> Subscriber: Esondrmn-at-aol-dot-com Sat Jan 4 21:21:46 1997
> Date: Fri, 3 Jan 1997 23:31:43 -0500
> From: Esondrmn-at-aol-dot-com
> To: tesla-at-poodle.pupman-dot-com
> Subject: Toroid Testing
> I think I might have answered one of my questions that I posted yesterday. I
> was curious about my safety gap firing most of the time with my new small
> I built two toroids when I put this system together. One is 10" x 1.5" and
> the other is 12" x 1.75". I have been using the 12" version. Tonight I
> placed a shot glass (1 to 1.5" high) on top of the toroid and placed the 10"
> toroid on top of that. I noticed the coil now ran with much larger
> discharges (more power) with the longest discharge going up from a previous
> 11" to 14". (My primary is only 16" away, I see a new strike ring coming.)
> I figured the strikes would get longer, this thing needs much more toroid.
> I noticed the safety gaps were firing less often - much less. I speculate
> the added capacitance of the second toroid in proximity of the first changed
> the frequency of the secondary to more closely match that of the primary.
> Better tune - less firing of the safety gaps. Does this make sense? Has
> anyone ever used the minimizing of the safety gap firing as a tuning
> I tried a different height glass spacer and noticed different results. I
> think this might be a good method of tuning. Get several different height
> glass spacers and place them between the toroid mounted on the coil and
> another sitting above it - and maybe another above it. The arcing between
> the two toroids also makes a nice display. Anyone tried this?
> I tried this once on my large system running with a 40" toroid and a 33"
> toroid sitting directly on top of it. It is difficult to learn much outside
> at night, running at 7kva with discharges going all over the place. It's
> nice to see that you can learn as much or more working with a small coil in
> the basement. Not rocket science, but I am still learning something.
> Ed Sonderman
This is very interesting. Yes you might have influenced tune a bit with
your system, but more importantly you made an air capacitor which could
be charge to a definite DC potential over and above the Rf value. Very
interesting. The DC part would be ruined with any sparks arcing between
toroids. I gotta try this without the inter-toroid sparking.
For those interested, take a large 3000 pf doorknob and set it inside
the depression of your toroid with the bottom contact touching the
toroid. next place a coathanger wire or pointed tip up into the air and
connected to the other cap terminal. Now operate the coil at very low
power or output. (4-5" sparks). Shut the system off. Watch out****
The cap is DC charged now and depending on how fast you get to it a
nasty, hot discharge will take place if it is shorted out. More proof of
DC charging from a TC with supposed AC RF blasting through it.
Richard Hull, TCBOR