From: FutureT@aol.com
Date: Mon, 13 May 2002 12:49:03 EDT
Subject: Re: [TSSP] Racing arcs
Paul, Malcolm, all, another thing I thought I'd mention is a comment from the Corums'. I don't have confidence in them, but this could maybe be a factor. They mentioned that when the frequencies split due to overcoupling, the lower primary split frequency currents tend to be in phase with the secondary, but the higher split frequencies tend to be out of phase with the secondary. I was thinking that maybe these out of phase conditions are causing an extra voltage stress between primary and secondary which is promoting racing sparks near the bottom of the secondary? I don't know if this makes sense? This could fit in with what Malcolm said perhaps, about tuning lower to emphasis the lower frequency. This would reduce the out of phase higher frequency component, and perhaps lessen voltage stresses that may cause racing sparks? In a voltage stress vein of observation, I have noticed that various sharp points on the primary, can cause racing spots at the facing areas of the secondary. Cheers, John
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.