Has anyone tried a loop like this in the Horizontal plane? I suppose if one had an AZ mount they could try it from horizontal to Vertical. His flag build was in the July 2015 QST. W0MU ___________
Hi Mike, A horizontally polarized loop -- or any other horizontally polarized 160 meter antenna -- has extremely poor sensitivity when installed less than about 0.1 wavelenght above the ground. Even
Thanks! I think I will still try to build the vertical version to try. A horizontally polarized loop -- or any other horizontally polarized 160 meter antenna -- has extremely poor sensitivity when in
Author: CUTTER DAVID via Topband <topband@contesting.com>
Date: Wed, 1 Aug 2018 20:04:52 +0100 (BST)
Drifting the thread slightly: I read an article recently regarding 2 loops of 15ft square separated by 15ft which the author called Loop On Ground, LOG. He claimed good results on receive over a peri
DuckDuckGo brought up this at the top of its search: http://kk5jy.net/LoG/ Presumably that is what you mean? best wishes, Nick VE7DXR At 19:04 2018-08-01, CUTTER DAVID via Topband wrote: Drifting the
That's a terrible RX antenna. Did you see the losses?! Minus-forty-something dB on 160. 73, Mike www.w0btu.com _________________ Topband Reflector Archives - http://www.contesting.com/_topband
Author: Steve Lawrence via Topband <topband@contesting.com>
Date: Wed, 01 Aug 2018 12:57:24 -0700
Mike - After many experiments, what I came to understand is that a loop is a loop is a loop. They're all variations on a theme. Ground dependent vs independent. Elevation. Size vs capture area. Need
Author: Steve Lawrence via Topband <topband@contesting.com>
Date: Wed, 01 Aug 2018 12:59:27 -0700
Mike - After many experiments, what I came to understand is that a loop is a loop is a loop. They're all variations on a theme. Ground dependent vs independent. Elevation. Size vs capture area. Need
Isn't a waller flag in the minus 50's? 73, Mike www.w0btu.com DuckDuckGo brought up this at the top of its search: http://kk5jy.net/LoG/ Presumably that is what you mean? best wishes, Nick VE7DXR At
Author: Carl Luetzelschwab <carlluetzelschwab@gmail.com>
Date: Wed, 1 Aug 2018 17:13:03 -0400
Note that the KK5JY antenna is a single loop, not a double loop as G3UNA referenced. That gain value is in the neighborhood of what a Waller Flag does. Carl K9LA _________________ Topband Reflector A
That gain value is in the neighborhood of what a Waller Flag does. However, the Waller Flag is a dual loop that trades off signal for pattern. The LOG simply throws away signal due to attenuation of
Does the article referenced then not go on to describe a phased array of two LoG's (Figure 7)? Nick VE7DXR However, the Waller Flag is a dual loop that trades off signal for pattern. The LOG simply t
Author: Carl Luetzelschwab <carlluetzelschwab@gmail.com>
Date: Wed, 1 Aug 2018 18:01:50 -0400
Joe, I agree. But I believe it's gain is very low mostly because it's made up of electrically very small loops. A very small loop has its main lobes in the plane of the loop - not perpendicular to th
Thanks for pointing that out. However, I didn't intend to word it the way I did, implying that it was terrible because of its low gain. 73, Mike www.w0btu.com _________________ Topband Reflector Arch
Author: David Cutter via Topband <topband@contesting.com>
Date: Thu, 2 Aug 2018 11:32:10 +0100
I am at a loss to know how to model it with any confidence, for wires close to or on the ground. David G3UNA Joe, I agree. But I believe it's gain is very low mostly because it's made up of electrica
Author: Carl Luetzelschwab <carlluetzelschwab@gmail.com>
Date: Thu, 2 Aug 2018 07:28:38 -0400
David, The NEC-4.2 engine appears to give very good results with buried and close-to-ground wires (the NEC-4.1 engine compares favorably, too). It is instructive to read N6LF's July/August 2016 QEX a
Author: David Cutter via Topband <topband@contesting.com>
Date: Thu, 2 Aug 2018 13:37:13 +0100
tnx I'll look at that David G3UNA David, The NEC-4.2 engine appears to give very good results with buried and close-to-ground wires (the NEC-4.1 engine compares favorably, too). It is instructive to
But that gain is in the vicinity of small pennants, f;ags and others. I often use smaller loops and flags with a preamp. At 160 and nearby, I believe my preamps (Clifton Labs, ARR etc) have goodenoug
Author: Steve Lawrence via Topband <topband@contesting.com>
Date: Thu, 02 Aug 2018 20:27:54 -0700
It's much more useful to think of RX loop antennas as having directivity rather than "gain." The full size flag has a rather broad pattern of around +/- 60 degrees so that it can be pointed to improv