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Re[4]: LF: Zmag of 45.6 Ohms OK, or should I try for better?

To: Mike Dennison <[email protected]>
Subject: Re[4]: LF: Zmag of 45.6 Ohms OK, or should I try for better?
From: Chris Wilson <[email protected]>
Date: Mon, 2 Nov 2015 13:48:21 +0000
In-reply-to: <[email protected]>
Organization: Gatesgarth Developments
References: <[email protected]>, <[email protected]>, <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Hello Mike,

Monday, November 2, 2015


I  have  this variometer, (although it was sold to me as a goniometer,
for a fiver, and is unused).

 http://www.chriswilson.tv/goniometer.zip

 It measures, at 136kHz, between 16.3 uH to 97.8 uH, series connected,
 quite a bit less parallel connected. Could I use it, it would be easy
 to motor drive the fine tune shaft with the gear and quadrant on it?


> Chris, my 3C90 transformer has about 16 turns on each winding. (I say 
> approximately as I need to adjust by a turn or two between summer and 
> winter due to absorption/detuning by trees. I would suggest using the 
> thickest wire you have in case you want to run higher power in the 
> furture.

> As for the variometer, mine covers about 200-500mH and this will tune 
> about twice the width of the 136kHz band (in conjunction with my big 
> coil). Coincidentally it also tunes the 472kHz band when the big coil 
> is removed.

> Mike, G3XDV
> ==========











-- 
Best regards,
 Chris                            mailto:[email protected]


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