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://ww
ot;
To: a...@yahoogroups.com; Mailing list for the International Radio Club of
America ; a...@nrcdxas.org
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 varic
I've got a big black plastic knob on the thing. I think the main
problem is that the tuning capacitor is mounted inside the loop, and I
get hand capacitance effect without even touching the capacitor or the
knob.
I may try moving the capacitor to a spot outside the loop, or maybe
even use some MVA
On 04/12/2012 01:13 PM, Mike Westfall wrote:
I've got a big black plastic knob on the thing. I think the main
problem is that the tuning capacitor is mounted inside the loop, and I
get hand capacitance effect without even touching the capacitor or the
knob.
What is the design of that loop Mike?
Just a basic 2 foot, 12 turn box loop, 18 gauge windings spaced at
7/16". The capacitor I happened to have on hand is just a single
section Hammerlund job that I had scavenged from somewhere.
On Thu, Apr 12, 2012 at 1:01 PM, Rick Kunath wrote:
>
> What is the design of that loop Mike?
--
Mike
