Re: "Gas burner" corona from STSG driver

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

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
>
>