Re: Capabilities of Small Thin Wire Secondaries (fwd)
---------- Forwarded message ----------
Date: Wed, 29 Jul 1998 10:47:39 EDT
Subject: Re: Capabilities of Small Thin Wire Secondaries (fwd)
In a message dated 98-07-28 15:29:52 EDT, you write:
<< A few racing sparks appeared
> > after awhile, but a household fan blowing on the gaps helps slightly.
> > Eventually the gaps heat and racing sparks appear, although the
> > quench on the scope could be seen to remain at 1st notch.
> Correct me if I'm wrong but that would seem to be an indicator that
> racing sparks are not necessarily (if at all) caused by the
> frequencies present when a beat envelope is present?
> A very interesting post indeed. I may comment further at some stage.
> Malcolm >>
I agree. Unless my scope isn't showing me the whole picture. I'm
not 100% sure it's showing me each firing. I'm not sure how well the
triggering function works in a Tesla environment. For instance if for
some reason the scope is triggering only on the first gap firing during
an AC half cycle, it could then be possible that subsequent firings
are not quenching as well, but I'm not seeing it? I have no idea if
this is likely or not...it's just a thought. I'm using a short wire connected
to the external trigger scope input, since this seems to give the steadiest
It is interesting that the racing sparks occur only after the coil runs
awhile, which suggests to me either the scenario above, or maybe
the general ionization levels gradually build so high around the coil,
that breakdown is promoted?
Maybe the quenching can remain at Ist notch, but degrade in some
I think the use of a household fan blowing on the gaps held off the
racing sparks for awhile in some tests, which suggests a quench
related cause, (unless the blowing air also affected the ionization
around the coil).
Mysterious, definitely an interesting issue.