[TCML] Re: Spark gap Resistance
Barton B. Anderson
bartb at classictesla.com
Tue Nov 20 22:23:35 MST 2007
It's a theory. I see this similar to drawing an arc vs initiating an
arc. The only problem in reproducing the phenomenon is the reduced
energy in the time frame allowed. Thus, hard to prove. It's similar to a
high energy thermal channel in the spark gap.
However, just because one coil may not be as well adapted to dissipating
sparks at the 1st notch doesn't mean another coil can't. I think for the
typical garage coil, 1st notch quenching is rarely obtainable due to
both secondary and spark gap. But, I think it can be achieved with good
results if one goes to lengths. Trying to force it or trap it in the
secondary is a little silly to me. Well, as long nothing dies, there may
be some benefit.
There is an undeniable truth: If the secondary can release the energy,
there is nothing to continue the gap and it will quench. The question is
what mechanisms prevent the secondary from dissipating all the energy in
a single ring up? A lot of different things and not all we can control
The gap I see as simply a loss. Higher energy should be lower gap
losses, increased conductivity, and higher temperatures. If there is
energy remaining in the secondary to travel back across, it will and
more easily at higher energy. Getting rid of the energy in the first
place seems to me to the hidden key to all of this.
FutureT at aol.com wrote:
> In a message dated 11/20/2007 9:38:15 P.M. US Eastern Standard Time,
> bartb at classictesla.com writes:
> If the energy is quenched by the 1st primary notch, there is only a
> single ring up "time" for the spark channel itself. If we quench on the
> 2nd primary notch, the "time" of the secondary sparks are controlled by
> the ring up time between each spark and the energy bussed to the
> developed spark channels. It's not difficult to see that faster quench
> times may not always be preferred.
> In second notch quenching, the secondary has rung up twice and produced
> a spark in each ring up and likely in the same channel as it is hot and
> ionized by the first ring up event. I expect the channel to be more
> conductive and possibly allow a little longer protrusion on the second
> ring up event.
> I remember when Bert H. speculated about this a number of years ago.
> I don't think there's any proof yet either way regarding whether the
> second transfer extends the spark. (Please update me if I missed it.)
> My concern is that the second transfer might just brighten the spark
> but not lengthen it. Of course brightness is good too. If the second
> transfer does lengthen the spark, then yes that would be still another
> reason to not worry about 1st notch quenching.
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