Re: variable inductor primary tuning (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 23 Jul 2007 07:22:35 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: variable inductor primary tuning (fwd)

Hi Scott,

As long as you can vary the inductance in the tank circuit, the tuning 
will change. You could use an off-axis inductance, but you may also want 
to consider a dual-layer primary. If you made the connection from the 
lower primary to upper primary adjustable (up and down), you could vary 
the inductance by positioning the height between the two primary's. 
Another benefit is the primary would be more compact.
http://www.classictesla.com/java/2layer/duallayer.html

Take care,
Bart

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Sun, 22 Jul 2007 22:10:38 -0400
>From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: variable inductor primary tuning
>
>Hey guys,
>     If one was building a small TC or other resonant circuit and wanted to 
>make a fixed primary (without taps) would one be able to put some kind of 
>variable inductor in series with the primary coil, and vary the tuning in 
>this manner?  I would assume this would not be the most efficient way, but 
>does it actually work this way or not.  Thanks.
>Scott Bogard.
>
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