Hello Rick,
I did go to the archives and read the W1ZR article. It was
pretty basic stuff. There is another source of info about Open Feeders.
Just go to Google and search ... The Lure of Ladder Line .... We teach a
beginners class for Technician and also the General Class here in Tennessee
and I always hand out copies of this article and explain feed lines. Is it
just me ... or has the good old Open Feeder type of feed line ( Ladder Line
) been making a come back? Guess I will be investing in some 14 gauge wire
and some type of spreaders. Thanks ...
Wade/KJ4WS
I wonder if Epay has any old fashioned Dog Bones for sale?
On Mon, Jul 29, 2013 at 3:54 AM, Rick - DJ0IP / NJ0IP <Rick@dj0ip.de> wrote:
> 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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