Message-
From: Ron D'Eau Claire [mailto:r...@cobi.biz]
Sent: Monday, August 03, 2009 7:38 PM
To: 'Stan Jacox'; Elecraft@mailman.qth.net
Subject: RE: [Elecraft] Magnetic Loop antenna...off Elecraft topic
I'll certainly second David's, G3UNA, comments about using a wire for
transmitting
Stan Jacox wrote:
Anyone else build small loops for use with their QRP rigs for a while? The
only down side I've seen is the need for more complex remote tuning and
narrow range before needing to retune. What has been your experience? What
am I missing, since the magnetic loop seems to solve
In my experience magnetic loops and QRP are incompatible UNLESS we are at a
high sunspot situation. Lots of articles have been written over the years and
a good one was in QST using a trombone-shaped tubing for the tuning capacitor
with PTFE between the parts. Use minimum 22mm copper tube and
I'll certainly second David's, G3UNA, comments about using a wire for
transmitting.
Loops can be very effective for receiving though, as you noted. Any decent
receiver (like the K2) has plenty of excess gain to make up for the losses
in the loop itself, and they do tend to pick up less noise.
Stan Jacox wrote:
...
I found a small plumbing shop open late and bought 4 meters of 1/2in copper
tubing and made a loop this evening. I had no high voltage capacitors so cut
various lengths of RG-58A to use as coax caps and kluged a Faraday shielded
loop coupling system to drive the main
All I can say is: WOW.
Doug -- K0DXV
Augie Hansen wrote:
Stan Jacox wrote:
...
I found a small plumbing shop open late and bought 4 meters of 1/2in copper
tubing and made a loop this evening. I had no high voltage capacitors so cut
various lengths of RG-58A to use as coax caps and
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