Topband: How much ground independence?

[Bruce]

Hi Chet,

Think the closer radials were coupling transmit tower signals to the loop.
Detuning the transmit antenna may also have fixed the problem.

I am trying to find out how much the loops hear from the transmit radials. 
You may have answered that question.

Thank you,
73
Bruce-K1FZ





----- Original Message ----- 
From: "chetmoore" <chetmoore at cox.net>
To: "'Bruce'" <k1fz at myfairpoint.net>; <topband at contesting.com>
Sent: Monday, December 09, 2013 12:43 PM
Subject: Re: Topband: How much ground independence?


> Hi Bruce,
>
>
>
> I can't speak to a flag but I had a W2UP rotatable loop that I turned with 
> a
> small  TV rotor and one of your transformers. It worked great for about 
> year until
> I ran 4 or 5 radials out to within about 10 feet of it. Bottom of the loop
> was about 8 feet off the ground. It lost all Directivity  and once taken
> down at the end of the 160 season,  I never  Put it back up.

  There was the possibility to get the bottom wire up 15 feet
>  Higher were I to put it back up but really did not expect that to help 
> and
> never put it  Back up.  It was quieter than the shunt fed tower and seemed 
> to pull the
> weaker sigs Out of the noise when I switched between the 2.
>
> Sigs from the west coast were particularly weaker here this year than I
> remember them  Being last year.  In the test this weekend, I missed 
> working ve7oo. He had a
> lot of qsb
>
> On him at this qth and I could not hear which stations he was coming back
> to. I wonder If the loop would have pulled him in.   I too wonder if 
> adding 10 -20 feet
> in height  Above the radial field would get the directivity back.    That 
> could be a
> project for  A warmer and dryer day than we have today.   Some 
> consideration has been
> given to digging
>
> Up the radials noted above or  shortening them by 20 - 30 feet. If I had
> reason to believe  It would help, I could get it up another 20 feet and 
> shorten the radials by
> that amount.
>
> I did not detune the loop on xmit.  As for good front to back, The loop
> could hear  Sigs that were not audible on the shunt fed tower Those sigs 
> of which I
> speak, were  Not moving the s meter but it was the difference between 
> knowing they were
> there and  Being able to copy well enough to call the station after they 
> called CQ.
>
> 73
> Chet N4FX
>
>
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Bruce
> Sent: Monday, December 09, 2013 11:51 AM
> To: topband at contesting.com
> Subject: Topband: How much ground independence?
>
>
>
> Has anyone installed a Flag antenna over a radial field?
>
>
>
> What was the flag height above ground?
>
>
>
> Did it hear well and have a good front to back?
>
>
>
> If poor performance, did de-tuning the transmit antenna make a large
> difference ?
>
>
>
> If the flag was moved to a non-radial field location, what was the
> difference?
>
>
>
> Thank you in advance,
>
>
>
> 73
>
> Bruce-K1FZ
>
> <http://www.qsl.net/k1fz/beveragenotes.html>
> www.qsl.net/k1fz/beveragenotes.html
>
> _________________