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Re: Tube Type Tesla Coils
Subject:
Re: Tube Type Tesla Coils
Date:
Sat, 15 Mar 1997 00:28:28 -0500 (EST)
From:
FutureT-at-aol-dot-com
To:
tesla-at-pupman-dot-com
<<snip >>no transmission line with a Tesla coil. One way to make the
test is
to
>set
> up a robust oscillator and connect it to the TC secondary coil via a
> calibrated transmission line and a bridge type VSWR meter. This test
> would
>not be static and would be at low voltage.
John, I seem to remember hearing that the Corum's (or maybe their
students), did this with a tube coil. If I remember correctly, they
were
able to acheive a quite low, maybe 1.5 or so VSWR, and they said the
coil did
perform best at lowest VSWR. I don't remember where I heard this story.
> The Corum's said they measured a TC at 1000 VSWR but did not say how
> it was done.
It was my impression that these high VSWR's were acheived using some
form of
actual cavity, but I have no "hard" info on the matter. I don't really
know.
>. Dr. Gary Johnson of Kansas State University measured a TC at
> 200
> VSWR. He gave some details on this test at the 1992 Tesla Symposium in
> Colorado Springs.
> The advantage of knowing the VSWR of the TC is to determine if the TC
> is
> properly tuned for maximum output. The Q factor can also be found with
> this
> test. This Q factor should then be coordinated with the operating spark
> gap duration.
I thought that k factor would much outweigh Q factor regarding firing
duration requirements.
> Has any coiler researched this parameter? This test is also related to
> the
> Smith Chart but I have not found that very helpful. The Smith Chart was
> designed for radio work.
> John Couture
>>
John Freau