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Re: Fw: Arc Impedance Study - Computer Models

Hi John, All,
    The toothpick striking a rock is a good analogy.  I wonder if the
minimum size for the capacitor in the primary is related to the
secondary capacitance (incorporating losses) by an energy
relationship.  Maybe the energy in the primary capacitor needs to be
at least equal to the energy in the secondary self capacitance without
a toroid and no bigger than the energy in the secondary with toroid
plus a few pF for the streamer.  Too small, small or no streamer.  Too
big, big streamer plus cooked spark gap plus ancillary needless
losses.

Barry

-----Original Message-----
From: Tesla List +ADw-tesla+AEA-pupman-dot-com+AD4-
To: tesla+AEA-pupman-dot-com +ADw-tesla+AEA-pupman-dot-com+AD4-
Date: Tuesday, October 13, 1998 10:53 AM
Subject: Re: Fw: Arc Impedance Study - Computer Models


+AD4-Original Poster: FutureT+AEA-aol-dot-com
+AD4-
+AD4-In a message dated 98-10-13 01:43:50 EDT, you write:
+AD4-
+AD4APAA8- +AD4-        I run a large cap small Lp coil on quite modest
primary
+AD4- +AD4- voltages with a single static and get sterling performance with no
+AD4- +AD4- gap cooling, airflow etc. However, running with a small cap and
the
+AD4- +AD4- same leakage-L limited transformer, the same gap does not do the
job
+AD4- +AD4- and requires the extras to perform. Anyone else found this?
Resonant
+AD4- +AD4- charging systems in particular seem to perform well with the
simpler
+AD4- +AD4- gaps.
+AD4- +AD4-
+AD4- +AD4- Observations invited,
+AD4- +AD4- Malcolm
+AD4- +AD4-  +AD4APg-
+AD4-
+AD4-Malcolm, all,
+AD4-
+AD4-This is very interesting.  One would think that the smaller cap would
+AD4-allow for easier quenching, unless the faster firing repetition is
keeping
+AD4-the gaps too hot (?)  Using resonant charging, the gap firing will
occur
+AD4-when the mains are at a low voltage, this may help prevent some sort
+AD4-of power arcing conditions?  But then again, quench doesn't matter
+AD4-much.  I think I've seen the same effects you
+AD4-noted, but my experiments weren't well controlled.  I suspect that
+AD4-when the cap is too small, it does a poor job of exciting the TC,
it's
+AD4-like trying to break a rock by striking it with a toothpick, instead
of
+AD4-a sledgehammer.  Does this seem reasonable in any way?
+AD4-
+AD4-John Freau
+AD4-
+AD4-