From: "Barton B. Anderson"
Date: Wed, 15 May 2002 21:02:12 +0000
Subject: Re: [TSSP] Racing arcs
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.