Re: Conditions for opt. loading, was: In vs. Out

From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Thursday, July 31, 1997 2:43 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: Conditions for opt. loading, was: In vs. Out

Hi John,
> From:   FutureT-at-aol-dot-com[SMTP:FutureT-at-aol-dot-com]
> Sent:   Thursday, July 31, 1997 3:40 AM
> To:     tesla-at-pupman-dot-com
> Subject:    Re: Conditions for opt. loading, was: In vs. Out
> > I've found that it is critical to hit the "right" spark impedance for 
> > optimal loading to occur. This occurs (at least at modest k values) 
> >with an attached streamer that is the longest it can get before 
> > detaching. Using shorter attached sparks than the coil can produce 
> > does produce a mismatch. If you move a ground rod up to a running 
> >coil, the optimal length is easy to see in a dimmer gap discharge. 
> > Moving the rod closer than this brightens the gap up again.
> >     I could write a book on it. Perhaps the best way is to try it 
> > single shot, then try it for the running coil. The lengths are 
> > different as you have energy stored in the discharge channel/ion 
> > cloud for the repetitive situation and I've found under this 
> > condition, optimal loading occurs with longer sparks than sshot.
> >     It is kind of difficult to elaborate further without giving an 
> >actual demonstration (which I would dearly love to be able to do).
> > Malcolm
>   >>
> Malcolm, All,
> Thanks,  I see exactly what you're saying now...  Have you compared
> the quenching ability of twin coil with that of a regular coil?  I suspect
> (based on Robert Steven's results) that a twin coil may give a more
> optimal loading.  Maybe even a triple or quadruple coil would be better
> as far as optimal loading, but probably not for spark length.
> Comments?
> John Freau

No I haven't but I'll take the storage scope home this weekend and 
check on the mini coil system. From the gap discharge brightness 
under various loading conditions it looks to be much the same but the 
scope will tell the true story. Judging by results the attached 
streamers are longer in the twin configuration. BTW, Bert Hickman had
a great idea that explains why one _does_ get longer sparks in twin 
systems generally. Perhaps he'd like to explain.