PRACTICAL TUNING QUESTION
Subject: PRACTICAL TUNING QUESTION
From: richard.quick-at-slug-dot-org (Richard Quick)
Date: Sat, 4 Feb 1995 01:59:00 GMT
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> From: EDHARRIS-at-MPS.OHIO-STATE.EDU
> Subject: Practical Tuning Question
EH> OK all,
EH> I'd like to pick your brains about optimal tuning for coils.
EH> When does one find that the optimal secondary sparks occur?
EH> (A) When the system is tuned at low power (no secondary
EH> (B) The system is only optimally tuned when the coil is run at
EH> a given power level (tuning is a function of power level)?
EH> (C) none of the above.
EH> I can't exactly say what I mean by "optimal" sparks because I'm
EH> not sure if one gets fatter or longer or brighter discharges when
EH> the tuning is optimized.
You get all three.
EH> The point behind all of this is that I've been wondering how
EH> much the discharge's capacitance changes the tuning of the coil.
This depends on the size of the discharger. If you have small toriod
that breaks out all over the place (three or more streamers at once)
then things like conductive ion clouds (descernable with time photo-
graphy) affect the discharger capacity, and that affects the system
tune. This ion cloud, and therefore the tune, will vary with power
On the other hand if you have a very large toriod, and only one
streamer issues out most of the time, the discharger capacity remains
much more constant. A consistant tune can be maintained through
a variety of power levels.
EH> This probably isn't a very simple problem from a theoretical
EH> point of view since the capacitance chages in time as the
EH> discharge progresses outward. But, I would just like to have
EH> people's observations of their own coil(s).
Well tuned with a very large discharger; the spark adds a neglible
amount of additional capacitance to the system.
... If all else fails... Throw another megavolt across it!
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