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 Scott,

Interesting experience, I take your shot put the sign "- and +"
on the photo renamed it corona_polarity.jpg and I'll post it to
Terry temp folder for future reference. Tx Scott.

Cheers,

Luc Benard

P.S. I hope you don't sue me for copyright privilege ;-)

Tesla list wrote:
> 
> 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