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Re: [TCML] Tuning primary to secondary with a scope

I'm using a hardware clothe counterpoise on my coil, should I leave that out of the equation as you would the RF ground? I'm assuming yes, but you know what they say about that...
Also, in the documentation with Terry's Tuner, the device is hooked up to the bottom of the secondary and ground. Will any ol' ground do, or should I use the counterpoise for real world accuracy?

--Brandon H.

On Mar 20, 2012, at 12:40 PM, "Phil Tuck" <phil@xxxxxxxxxxx> wrote:

> To scope the secondary I just remove the RF earth and feed the signal into
> the base and use a probe as an aerial, as far away as you can pick it up
> still. Even then if someone walks past [say] 8 foot away on a medium sized
> coil, you can see the effect on the scope.
> There is a difference in the results gained between scoping them separately
> (probably the correct manner) or with both sitting in situ on the coil, but
> only around two or three  kilohertz, I find on mine. As Gary states it's
> best to learn doing them separately, first of all, to avoid possible
> confusion.
> Phil
> .
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Gary Lau
> Sent: 20 March 2012 12:49
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Tuning primary to secondary with a scope
> I don't think that you want a direct connection of the scope to the
> secondary, as the capacitance of the scope and probe will significantly
> alter the resonant frequency of the secondary.
> Also, the primary and secondary circuits need to be tested individually, in
> a way that avoids coupling between them.  Strange things occur when they're
> allowed to couple, making it hard to know what's going on.
> Regards, Gary Lau
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