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.