From: Bert Hickman
Date: Wed, 09 Oct 2002 20:24:38 -0500
Subject: Re: [TSSP] TOPV breakout threashoul
Marc, Try this: when the safety gap fired it was because you had excessive voltage stored on the tank cap (i.e., the triggered gap didn't fire properly). And, when the safety gap fired, it discharged the tank cap through the primary winding and through the two series resistors that were part of the Terry filter (perhaps as an overdamped discharge?). However, sufficient energy may have still been transferred to the secondary to trigger a weak, but observable, discharge. Anyway, that's my best guess... Best regards, -- Bert -- -- Bert Hickman Stoneridge Engineering "Electromagically" (TM) Shrunken Coins! http://www.teslamania.com marc metlicka wrote: > > Paul ,All > The system was using my triggered gap with fritz filter and the safety > would fire if i adjusted the triacs turnoff point above and below > maximum for output. > Malcolms comment gave me something to think on, even if all activity > was stopped from the sgap there must still have been a charge in > secondary C along with topC. Maybe this energy just had to go somewere, > Maybe this is the result of the short thin streamers surounding the > topload? It did seem that the few stroung streamers instantly reverted > to the faint ones at the instant the sgap fired, these could be seen > over the light of the gap and now i wish i would have covered this light > for a chance to see the ion glowing cloud, and i wish now that i would > have tried a close ground rod to see if these faint leaders would > coalesce into a ground strike instead of the eaqualy placed ones? > Even though windows XP has given me much grief, i have found a patch to > alow up to 300 fps recording from my camera to disc, I can't wait to try > that! > > One other video i have of my 3k coil running outside was giving me solid > 10' strikes to an aluminum ladder with 3kva input, when i moved the > ladder to 11' my cammera captured points were the streamer aproached the > ladder and there was a very strong ion cloud emiting from the ladder > itself, reaching out toward the tip of the streamer. this was happening > even though energy was being transfered to ground by the ladder (knowing > this due to the leaf litter burning below the legs. > Some time ago i wanted to creat an array of voltage sensors spaced > around the topload in a five foot area, I wanted to conect each vol. > sensor into a data aquasition unit to imput it into excell for a nice > graph of the shape and density of the space charged e-field. Just > haven't gotten the data acq. units yet, but still trying. > I tried looking at both tunned and detunned coils with theIR filter > lens for my cammera, but i haven't seen any IR componant within the ion > clouds. It would be nice to get a spectragrafgh of the light output from > the full range of discharge, then a filter could be gotten that will > allow us to se what is happening? > Also, In the acidental close up views i made of the strong discharge > from the 3kcoil system in op. A standard streamer fills half the screen, > this shows that the main conduction channel is very thin compared to the > charged componant surounding it, only slightly less dim but two thirds > the size. > I know all this info doesn't help us much with what we're working on > now? > The one reason i was thinking about using a bulb for a hopeful top > voltage base line, was that this could maybe give the starting point to > judge up or down the actual topv by what points abouve and below the > base point? > I apreaciat everyone understanding that i am a young coiler with only > four years in building and two years in studying, so many ideas are > silly i'm shure. > Take care, > Marc M. > > Paul wrote: > > > > Marc wrote: > > > > > When the safety gap would fire the normal 2' or so leaders > > > all of the sudden turned into a series of very faint short > > > streamers, many, many of them equally spaced around > > > the toroid. > > > > Can anyone say what sequence of events in a system (in general) > > leads to the safety gap firing? > > > > What's happening here in Marc's system? > > -- > > Paul Nicholson, > > --
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.