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Re: Interesting but not so impressive results...
--From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Sunday, September 07, 1997 7:52 PM
To: tesla-at-pupman-dot-com
Subject: Re: Interesting but not so impressive results...
Rod,
I earlier said (in complete and utter error)....
> >
> > _________
> > | | <---- started to become brighter.
> > | |
> > | |
> > | |
> > | | <----- virtually no corona
> > | |
> > | |
> > | | <----- brightest.
> > | |
> > | | <----- earth wire ---+
> > | | medium brightness |
> > --------- ---
> > Base. \\\
> >
> >
> > I guess this is an indication of what the wave is doing...
> >
> > Also, there could be alot of contributing factors -
> > 1/ zero quenching on the single-static gap
> > 2/ completely out of tune
> > 3/ No toploading
> > 4/ primary circuit no where near in resonance
> > 5/ secondary re-coupling energy back to primary
> >
> > etc..etc...
> >
> > But, I'm sure I'll fix it up soon, just need more money...
> > Some, if not most of you will agree, big coils are an expensive hobby! :-)
> >
> > Anyway, I was just wondering if anyone would like to elaborate on the
> > corona effects I observed with the secondary?
>
> Be happy to. My reading of that is that you tuned to the second
> harmonic and the response will be appalling from a coil that size. Hi
> Q resonators are pretty narrow band in response. Your gap will be
> taking a beating I'd think. Rather than increasing the primary cap,
> how about increasing primary L. You won't get the best from you
> supply with a static gap but I think you'd be pleasnatly surprised at
> the results.
That should of course be 3rd harmonic (3/4 wave), not second. Even so,
the results are somewhat less than I would have expected. I'll do
some calcs of your tuning later and post.
Malcolm