Re: [IRCA] Hand capacitance issues

[Alex P <winston376@xxxxxxxxx>]

Try using a non-conductive  tuning shaft extension  (nylon, plastic, phenolic/fiber).  This has worked well with LC oscillators and TX output PA tuning networks.  Also use a non-conductive knob.

Alex



________________________________
 From: "Mike Westfall, Lost Almost NM" <mwdx@xxxxxxxxxx>
To: ABDX@xxxxxxxxxxxxxxx; Mailing list for the International Radio Club of America <irca@xxxxxxxxxxxxxxxx>; am@xxxxxxxxxxx 
Sent: Wednesday, April 11, 2012 7:36 PM
Subject: [IRCA] Hand capacitance issues
 
Those of you that have built loop antennas, what have you done to
mitigate hand capacitance effect when turning the varicap?
I just built me a quick 2 foot loop, and I notice that when I reach in
to tune the loop, it changes the tuned frequency a little.

-- 
Mike Westfall, Los Alamos, NM
http://www.facebook.com/mesamike
My MWDX stuff: http://mesamike.org/radio/mwdx
Online logbooks: http://dxlogbook.gentoo.net
Reception Report & QSL Manager for KRSN
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