Re: question on rf ground (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Wed, 20 Dec 2006 17:53:54 -0800
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: question on rf ground (fwd)

I've had this occur on a small coil that was rather high in frequency 
and sensitive to a grounding. It only took a matter of tuning the coil 
when grounded. However, let me clarify that the grounding I used was a 
counterpoise and not a rod ground. The counterpoise changed the external 
C and thus required a little tuning. The reason the primary changed 
tuning is that the primary LC circuit had very little L. So a slight 
change in frequency made a considerable change in primary inductance.

Take care,
Bart

Tesla list wrote:

>Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>
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>---------- Forwarded message ----------
>Date: Wed, 20 Dec 2006 12:25:16 -0800
>From: Ed Phillips <evp@xxxxxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: question on rf ground (fwd)
>
>What is the difference between running a coil with a good rf ground and running it with the bottom of the econdary hooked to a probe I can draw like 20 inch arcs with the rf ground close to the toroid but only about six -10 inches with it grounded. i am puzzled by this and would like a little info thanks."
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>	Incorrectly tuned primary?
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>Ed
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