Re: Coupling vs secondary voltage chart

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Steve Ward <steve.ward@xxxxxxxxx>

Boris,

> Thought I have been pondering over the years  :Is it
> always true that the longest arcs from disruptively
> operated TC must be the ones that dissipate the
> highest power?

Where else would the power go?  It has to be used somewhere.

>
> My gut feel is this might not be always the case.
>
> Longer rise times (over more rf cycles) are good for
> arc propagation and they are achieved by lowering the
> coupling.

Where did you get this idea?  Maybe we need to define what "longer"
really is, 100uS?  300uS?  1mS? 5mS?  The old SSTCs took maybe 2-3mS
to develop the full streamer and they produce sparks far shorter than
a DRSSTC that requires only 200uS to develop its longest streamer
(typically).  Spark gap coils use even less time to ring up the
secondary.  It seems that faster rise times produce better sparks from
my experiences (but i only have experiences to go by).

> On the other hand,as you said,too low coupling results
> in primary spark gap (or IGBT),and primary in general
> ,chewing up more percentage of the available power.
> There must be optimum choice(s) between these two
> factors affecting performance for every separate
> system under consideration.

Yes, i agree with that.  This is what Terry's program is all about i think ;-).

Steve

>
> regards,
> Boris
>
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>
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