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
> ==========
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Best regards,
Chris mailto:[email protected]
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