From: "Barton B. Anderson"
Date: Mon, 13 May 2002 23:50:24 +0000
Subject: Re: [TSSP] Racing arcs
--Boundary_(ID_/X89uI+FAY30GLjy3tXlCw) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT Hi John, Racing arcs (for me) always has toroid breakout associated with it. Because of this, I can only assume sufficient voltage has developed to produce corona on and along the secondary which is equal to or higher than the toroids corona inception. I've experienced full blown arcs all the way down from the top and arcs that start from the top and breakaway out to the primary (typically outer portion of primary) from areas around the middle 2/3's of the coil. It appears to have a nice smooth corona road to travel, and depending on distribution, may break away before it travels the full length. From the types of racing arcs I've seen, the higher voltages, and thus corona, would be in the upper portions of the secondary. When I did see it break away, I was "always" running at high powers. Take care, Bart FutureT@aol.com wrote: > In a message dated 5/12/02 7:37:41 PM Eastern Daylight Time, > tesla123@pacbell.net writes: > > > >> As a matter of fact, yes. The racing arc was directly in front of me >> most >> of the time. There were a couple behind the coil, but mostly in the >> same >> path along the secondary. Start from the top and traveled in a >> streight >> path all the way down. Upon inspection after the testing, there was >> no >> damage and no contaminants I could see that would have caused them, >> but >> it was mainly localized to a particular path. >> >> Bart >> > > Bart, Paul, all, > > I wonder why some racing sparks are the type that travel all > the way from top to bottom of secondary (the entire distance), > whereas others are localized to the bottom, or center, etc. > I wonder if it's simply a matter of degree, or if something else > is happening? In some cases, I've had numerous racing > sparks occuring at many simultaneous spots on the secondary, > yet none went very far. These usually occured when quenching > failed, or at least when the gap overheated, I think. The kind of > racing sparks > that reached the full secondary length occured due to overcoupling > it seems ( I was using a very tight coupling in this case. ) > > I know that racing sparks near the top of the secondary can > be caused by mistuning (primary freq too high, so the voltage > peaks below the coil's top). > > Cheers, > John --Boundary_(ID_/X89uI+FAY30GLjy3tXlCw) Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7BIT Hi John,Racing arcs (for me) always has toroid breakout associated with it. Because of this, I can only assume sufficient voltage has developed to produce corona on and along the secondary which is equal to or higher than the toroids corona inception. I've experienced full blown arcs all the way down from the top and arcs that start from the top and breakaway out to the primary (typically outer portion of primary) from areas around the middle 2/3's of the coil. It appears to have a nice smooth corona road to travel, and depending on distribution, may break away before it travels the full length. From the types of racing arcs I've seen, the higher voltages, and thus corona, would be in the upper portions of the secondary. When I did see it break away, I was "always" running at high powers.
Take care,
BartFutureT@aol.com wrote:
In a message dated 5/12/02 7:37:41 PM Eastern Daylight Time, tesla123@pacbell.net writes:--Boundary_(ID_/X89uI+FAY30GLjy3tXlCw)--
As a matter of fact, yes. The racing arc was directly in front of me mostBart, Paul, all,
of the time. There were a couple behind the coil, but mostly in the same
path along the secondary. Start from the top and traveled in a streight
path all the way down. Upon inspection after the testing, there was no
damage and no contaminants I could see that would have caused them, but
it was mainly localized to a particular path.Bart
I wonder why some racing sparks are the type that travel all
the way from top to bottom of secondary (the entire distance),
whereas others are localized to the bottom, or center, etc.
I wonder if it's simply a matter of degree, or if something else
is happening? In some cases, I've had numerous racing
sparks occuring at many simultaneous spots on the secondary,
yet none went very far. These usually occured when quenching
failed, or at least when the gap overheated, I think. The kind of
racing sparks
that reached the full secondary length occured due to overcoupling
it seems ( I was using a very tight coupling in this case. )I know that racing sparks near the top of the secondary can
be caused by mistuning (primary freq too high, so the voltage
peaks below the coil's top).Cheers,
John
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.