Neons and Sync Gaps
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Tuesday, September 23, 1997 2:42 PM
Subject: Re: Neons and Sync Gaps
> From: FutureT-at-aol-dot-com[SMTP:FutureT-at-aol-dot-com]
> Sent: Tuesday, September 23, 1997 4:37 AM
> To: tesla-at-pupman-dot-com
> Subject: Re: Neons and Sync Gaps
> In a message dated 97-09-22 22:26:26 EDT, you write:
> << Hi John, all,
> > More cogitating on the dying neon problem suggests
> >another reason why the sync gap doesn't appear to kill neons readily
> > and also supports my theory of why the kickbacks are the major
> > killers. As the electrodes draw closer, the gap maintaining voltage is
> > also dropping and I would think the dwell time this allows makes sure
> > the gap is effectively shunting the transformer for as long as it
> > takes for secondary energy to all but disappear. In short, it seems
> > as if sync gaps have every reason to be the ultimate choice for neon
> > operation. Now I've got to have a crack at modifying motors as I've
> > decided that I will no longer use static gaps. Glad I found out now.
> > Malcolm >>
> I see what you're saying, but my sync gap often quenchs on the
> first notch, are you suggesting that the static gap sometimes
> quenches before the first notch? I didn't think this was possible?
No, it doesn't. Without airblast, first notch is rare except with a
strongly ionized attached output streamer.
> Maybe the static gap actually gives a longer firing time, but as
> the energy gets weak, after multiple beats, the arc then quenches
> at a "less than zero" point on one of these later beats due to the
> drawn out air blown spark in the static gap? Who knows?
Might be time for the scope again. I've never seen it quench with
energy still in the primary. I wasn't using airblast as such - just a
gentle breeeze from a fan. Can your rotary quench first notch with
no output streamer? Wherever that energy is coming from, it doesn't
need to be a great deal to seriously overvolt the neon. It was very
low judging by the safety gap discharge. 1/2 inch "safety" gap
setting is no real safety at all.
Still tryin' to crack it I guess,