From: "Barton B. Anderson"
Date: Sat, 11 May 2002 16:11:39 +0000
Subject: Re: [TSSP] racing arc thought
Hi Marc, For coils which do contain a charge, I have to believe it's either in the former or coating. It may be the makeup of the poly. I use marine spar varnish and never get a static build up. From all the posts on the list regarding this subject, I've often wondered if it was the former. Before this last coil, I used sonotube. This last coil I used pvc. In both formers, a static charge still is not detectible (at least without a sensitive static meter). Because of this, I would suspect it is the coating itself. Materials such as nylon will remember and build a charge easily. It's possible some of the coatings others are using contain similar property's. This might explain why I haven't experienced a static charged secondary. The reason I chose marine spar varnish was due to running in freezing temps in MN (I wanted a flexible coating that wouldn't crack under extreme weather changes). Although I'm in CA now, I still use it. Take care, Bart marc metlicka wrote: > hello all, > I have some thoughts in the back of my mind about those thick poly > coatings over the windings on most coils, you see, I never saw a acing > arc until the very first coil that i coated with many layers of spray > polyurethane? Most all my coils are a "moto finish" red, this is because > i tended to coat the windings in layer after layer of insulating > varnish. I liked the 2kv per mil. of dielectric property and the color > is nice too. > > I did wind a very small coil onto a "creamora" bottle (polystyrene" i > believe) This coil would race up down and sideways even with a 530 nst > turned low. This was also the first coil that gave me the "extended > charge" zap after a run, since i coated it in moto finish, I tend to > believe the charge was in the former? I have a "gut" feeling that those > thick coats of poly can build a static charge that at the very least, > cannot help guard against racing arcs. > Just a thought of mine that i'd be interested in hearing other opinions > on. > Take care, > Marc
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.