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Re: Tuning Observations
From: Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: Wednesday, July 23, 1997 2:54 PM
To: tesla-at-pupman-dot-com
Subject: Re: Tuning Observations
Hello Julian,
> From: Julian Green[SMTP:julian-at-kbss.bt.co.uk]
> Sent: Tuesday, July 22, 1997 11:51 AM
> To: tesla-at-pupman-dot-com
> Subject: Tuning Observations
>
> Has anyone noticed that the tune a coil is affected by spark length?
Yes
> I noticed this effect when tuning my coil at very low power where adjustments
> on the primary tap are extreemly sensetive. (By low power I mean output
> spark of 2".)
>
> Has the power of the coil is increased and output spark length increases to a
> point where the coil goes out of tune and spark length does not increase as
> power increases. Adding an extra turn of primary corrects the problem.
>
> I also notice that this effect is greater with a small toroid.
>
> The conclusion I have drawn from my observation is that as a streamer emits
> from the toroid it is in effect adding to the conductive surface area of the
> toroid and hence increases capacitance of the toroid. Perhaps the ion cloud
> also effects the capacitance of the toroid and hence tuning.
Your musings are absolutely correct. You might call it parametric
tuning :)
> Therefore use a larger toroid so these effects are minimized.
Reduced as you say.
Malcolm