Hi Noel.
Yep, a lot of people knock the good old horizontal loop for no good reason.
I'd like to get my loop up at 185ft!
I have a non resonant horizontal loop about 156ft total wire length at 25ft
AGL.
It's rectangular, 50ft x 28ft. The 28ft ends are oriented almost north -
south.
It's fed in the centre of the 28ft end nearest the shack with 8ft of RG58,
of which 1ft is wound onto a 6 inch x 3/8 inch ferrite rod. The choke is
right at the feedpoint, and has 12 turns.
I also have a Butternut HF6v ground mounted with 3 x 40ft buried radials (
keep meaning to bury more ).
This is a passable antenna on 40-10m and 80m as well, but not as effective
on 80.
The loop is usually 20dB stronger than the vertical within England / Wales /
Ireland.
With 100w to it, you can keep hold of a 40m slot.. tough going over here
these days!
No way could I do the same with the vertical, though it would keep the EU
off the slot.
The vertical is very good for central EU.
I believe that the angle of max radiation for the loop is around 50
degrees.. bit of a cloudwarmer really!
But got a 59 from a CX op a few days ago with 100w to it.
Have also heard VK and JA with it, somewhat better than the vertical.
Problem is that the vertical is noisy compared to the loop.
The loop works on all bands too, obviously not very efficient on 80 / 160m
but it does radiate.
I was thinking about putting an inverted V with 66ft legs up, feedpoint
about 40 -50ft AGL.
Reading your comments, maybe I won't bother!
Have you tried hanging one of your loops vertically?
I mean remove both supports from the unfed side and let it hang vertically
in the air at 185ft.
You guys call this a vertical skyloop, I think.
I'd be interested to hear how the V plays if you get it up higher.
I say the loop will prevail.. it has a larger capture area and surely a
lower angle of radiation than a V which is just a distorted dipole. Of
course the V may be better in the directions where the loop has nulls...!
All interesting stuff..
73..
Paul MW0CDO.
----- Original Message -----
From: <W9efl@aol.com>
To: <tentec@contesting.com>
Sent: Monday, March 15, 2004 3:26 PM
Subject: Re: [TenTec] 80 meter loops
> Hello Paul!!!! Regarding 80m loops. I have two orthoganal 80m loops and an
> inv V for 80m. I was told by several DXr's that I needed an inv V and
that it
> would outperform the loops. The V hasn't been up very long but so far the
loops
> blow the sox off the inv V.
> Admittaly the loops are up high.......top at 185ft and the V is at about
> 70ft. So there is a significant difference. This spring I'm going to raise
the V
> up to about 90 ft and compare. I like to investigate the launch angles
also of
> the loop vs the inv V. I'm open to any suggestions!!!!!!! 73 W9EFL NOEL
> _______________________________________________
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> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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