Re: "Gas burner" corona from STSG driver

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi Allan,

In an induction coil drive by a positive pulse, normally you have
a small negative pulse the same wide than the primary pulse and a
considerably higher and shorter positive pulse when the core
demagnetize, living you with an over all more positive output. I
never really test it but it's what I remember from school.

Cheers,


Luc Benard   

Tesla list wrote:
> 
> Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<allanh-at-starband-dot-net>
> 
> The output of a coil is not D.C., it's A.C., so there is no negative or
> positive side, but what you observed may be due to capacitive load on one
> side.
> 
> allan
> .
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Monday, December 31, 2001 11:38 AM
> Subject: "Gas burner" corona from STSG driver
> 
> > Original poster: "Scott Hanson by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <huil888-at-surfside-dot-net>
> >
> > Having built Jon Tebbs' excellent line-frequency synched TSG driver
> > circuit, I was playing around with it on my desk while waiting for the
> rain
> > to stop here in So California. I arranged some small pieces of heavy gage
> > aluminum foil so the edges were parallel, and connected them to the output
> > of the ignition coil. Running the system at 60 Hz produced a sheet of
> > beautiful corona between the foil edges, with a very different appearance
> > of the negative terminal (LH side of photos) and the positive terminal (RH
> > side). The negative side produced long, "brushy" corona from the sharp
> edge
> > of the foil, while the positive side produced a very short, compact,
> > "rounded" discharge. The corona created at the negative electrode is at
> > least five times LONGER than that produced at the positive electrode.
> >
> > The very different character of the positive and negative discharges poses
> > a question. When driving a triggered spark gap in a Tesla coil
> application,
> > should the trigger electrode be connected to the negative side of the
> > ignition coil? It appears that the negative terminal provides a much
> > greater ionizing effect.
> >
> > These photos can be viewed at:
> > http://surfboard.surfside-dot-net/huil888/gasjet-19s.jpg
> >
> > http://surfboard.surfside-dot-net/huil888/gasjet-22s.jpg
> >
> > http://surfboard.surfside-dot-net/huil888/gasjet-51s.jpg
> >
> > Regards,
> > Scott Hanson
> >
> >