One end of my 160M antenna being #12 hard drawn copper, about 30 ft from the
feed point runs through the top of a Maple tree. The only thing I've
noticed is the leaves and limbs burnt at the point the wire contacts the
tree. {Saves the cost of a tree triming service.} Wind, snow, ice and rain
have little to no effect on the operation.
As Will Rodgers said "it's not what folks know that concerns me, it's what
folks know that isn't correct, that gives concern". This I find to be
largely true with baluns and openwire line and balanced line.
73
Bob, K4TAX
----- Original Message -----
From: "Phil Sussman" <psussman@pactor.com>
To: "Scott Harwood" <scotthsr@earthlink.net>; "Discussion of Ten-Tec
Equipment" <tentec@contesting.com>
Sent: Monday, July 29, 2013 8:20 AM
Subject: Re: [TenTec] OT: Openwire/Window Line and Bad Wx
I also use openwire feeder with 4" spacing. Rain, snow, ice, wind, hot,
cool,
the tuner usually doesn't have to be adjusted. (Unless it's unusually hot
or
cold)
73 de Phil - N8PS
PS. I agree with Scott. I had a tree limb brushing the wire antenna and I
didn't notice it -- until my XYL pointed it out. Seemed to have no effect,
however.
---
Quoting Scott Harwood <scotthsr@earthlink.net>:
That was a great article. I'm a huge fan of open wire also.
Last year I had a contractor doing some work in my side yard and he
actually tied back my open wire line to an aluminum gutter using plastic
cable ties. I did notice I had to re-tune one day, but the guys I talk
to on 75 meters said my signal had been as strong as usual! I didn't
discover the tied down line until a week later while checking out his
work in the yard. Go figure.
Scott K4VWK
-----Original Message-----
From: Rick - DJ0IP / NJ0IP <Rick@DJ0IP.de>
Sent: Jul 29, 2013 4:54 AM
To: 'Discussion of Ten-Tec Equipment' <tentec@contesting.com>
Subject: [TenTec] OT: Openwire/Window Line and Bad Wx
I extracted this topic from the other thread on the Model 238.
How does bad weather affect openwire compared to its effect on window
line?
Lots of opinions, lots of myths.
Bob Allison (WB1CGM) and Joel Hallas (W1ZR) tested this to find out.
Their results are reported in the November 2009 issue of QST on page 66.
See: http://www.dj0ip.de/spiderbeam-1/spiderpole/pole-base-mount/ and
then
select "W1ZR" as author and "2009" as year.
Unfortunately you have to be a member of ARRL to download this and it is
copyrighted, otherwise I would post the download on my web.
Summary, for 95 ft. of feedline (the length they tested), the change is
negligible in both.
It is ever so slightly worse with window line, but less than 0.2dB.
NEGLIGIBLE!
The real difference is, true openwire changes it impedance only slightly
when wet, whereas the window line changes more and generally requires
re-tuning the matchbox.
One word of caution, which should be obvious: Neither are suitable for
running along the ground, whether wet or dry!
Being an operwire fanatic, I personally found this to be one of the most
useful articles ever published in QST.
73
Rick, DJ0IP
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