Re: Tube Impedance Matching

["Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Tesla list wrote:
 
> Original poster: "Malcolm Watts" <M.J.Watts-at-massey.ac.nz>

> (1) Treat the tank impedance as being a shunt in parallel with
> the actual load (spark). You can see that a low L/high C tank
> will shunt the tube's internal impedance like crazy. You are
> not actually matching to the tank.
> (2) I have seen a range of claimed output impedances for
> sparks of one sort or another. I suggest that in doing this
> people are attacking the problem from the wrong angle. I
> suggest instead that what really happens is that the spark
> "chooses" its own impedance based on the ability of the source
> to deliver. It will be seen from this that attempting to match
> a coil to a spark is an exercise in futility: the approach
> should be "what kind of spark do I want - ergo what kind of
> supply do I need to generate that spark?"

I agree that there is not much sense in try to model a so strongly
nonlinear system as a spark using terms that apply to linear systems
only, as impedance. 

Antonio Carlos M. de Queiroz