RE: "Gas burner" corona from STSG driver

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

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Allan -

Not correct. Tesla coils were used by hospitals to make X-Rays (DC needed)
until the thirties when other devices became available. Tesla said that
Tesla coils could produce DC because the negative output was greater than
the positive output. You can prove this by charging an electroscope with a
TC and checking the type of charge.

John Couture

-----------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, January 02, 2002 7:03 AM
To: tesla-at-pupman-dot-com
Subject: Re: "Gas burner" corona from STSG driver


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
>
>