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Re: Test: Bigger Secondary gives Bigger Sparks
Malcolm,
I'll be looking forward to your results of the tests. I wouldn't be
surprised if the *big bang* 2.7J aspect of the 2.7J set-up dominates
all the other factors and gives longest sparks no matter what,
especially with the 100 bps constant.
Cheers,
John Freau
-----
In a message dated 99-09-14 08:44:24 EDT, you write:
<< Anyhow, last night, I went through my notes and put a coil together
> on paper from the various secondarie, transformers etc. that I have
> lying around. What dropped out of the equations blew my socks off:
-----------------------
> > I removed the small secondary and installed a larger 4.2" by 23"
> > secondary also wound with #28 wire. I retuned at 18 turns on the
> > primary as needed. All else remained the same, but the spark
> > increased to 22" for a 57% increase.
> >
> > John Freau
---------------------------
> The voltages were chosen at random. What I
> ended up with were three different systems with the following
> attributes:
> Terminal 4 3 1 (my catalogue)
> Fo 250kHz 212kHz 180kHz
> Ctot(sec) 19.5pF 27.3pF 37.7pF
> Lp (requ) 33uH 45uH 63uH
> Xp 51ohms 60ohms 71ohms
> Vp (chosen) 15kV 18kV 21kV
> Ep 1.4J 2J 2.7J
> Again those voltages were chosen by the pen tip. Now for the
> cruncher:
> Vo (ideal) 379kV 383kV 382kV
>Coincidences like that make me think I've gone off the rails
>somewhere. Maybe someone else would like to do a sanity check.
> Anyway, assuming all is well with the above calculations, it seems I
>have an interesting series of tests ahead. Ep, Xp and Cs are the
> variables it appears I'll be examining in concert.
> Malcolm
>>