Nah, that one falls more under the category"
"THERE ARE THINGS WHICH DON'T EXIST."
When using 300 Ohm, it is best to at least buy the good stuff (like the
Wireman sells).
The Rat Shack stuff is not so good.
When I burry it, I simply insert the piece to be buried inside a flexible
PVC conduit - the kind they use here to run household electrical wiring
through. Also works when just laying it on the roof.
For running up poles, the little stand-off insulators are still available
from Rat Shack, so there is no reason to strap it to the pole.
Makes you wonder what his signal would have been like if he had done it
right.
BTW, as James said, "don't get Rick started on Openwire".
Like Bob, 50 years experience with it.
73
Rick, DJ0IP
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Bry Carling
Sent: Wednesday, February 13, 2013 9:31 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Open wire line
I worked a guy the other day who was using 300 ohm TV twinlead as a
transmitting feedline to a 70 foot long dipole. The feedline was buried
underground, and it was also running up taoed to a metal mast to the center
of the dipole.
All kinds of things that break the "rules of ladderline and hamdom."
I was astonished at what a great signal this guy had!
As Chuck Berry sang: "It goes to show you never can tell."
YMMV
73 de AF4K - Bry
Sanford, FL
On 12 Feb 2013 at 17:14, Edward Feustel wrote:
> I have used the open wire and open wire antennas that TrueLadderLine
> supplies. Formerly it was distributed by W7FY. The antenna is
> supported by trees at each end. A rope attached to one end of the
> antenna goes over the tree. A rope over the other tree is attached to
> a pulley.
> A
> rope attached to the antenna goes through the pulley goes to a hefty
> counter weight.
>
> I found that the open wire line worked well, but my 210 foot doublet
> that they had supplied kept breaking at the center insulator. The
> strain relief simply was not enough for my doublet and the 125 foot of
> Dacron line used to hold the antenna up.
>
> I replaced the horizontal wire with number 10 copperweld and the
> center insulator with a ceramic one. A 30 pound plastic canister of
> cat litter serves as a counter weight but it is not really heavy
> enough.
>
> Since I replaced the horizontal parts, I have not had any problems
> with winds or ice.
>
> Ed, N5EI
>
> On 2/11/2013 1:16 PM, Rick - DJ0IP / NJ0IP wrote:
> > Well I think the "true ladderline" looks pretty big and bulky and
> ugly and
> > subject to catching too much wind.
> >
> > It's very easy to build your own ladderline if you have the right
> spreaders.
> > IMO, the very best there is, and nothing else come even close:
> > http://www.hfparts.com/eng/products.php
> >
> > You can see where I used the smallest ones in the pictures of my
> shack in
> > OKC, here: http://www.dj0ip.de/my-station/oklahoma-2010/
> > Using the small set as I used here, you get about 450 Ohms.
> > Longer spreaders can give you 600 Ohms or even more.
> > Take your pick. They come in several sizes.
> >
> > Outside the shack I spaced the spreaders about 1 ft. apart.
> > Inside the shack I spaced them about 6" apart.
> >
> > Although they slip right onto the wires quite easily, they don't
> slip off.
> >
> > Unfortunately I don't think they have a US distributor.
> > You'll have to order from Germany.
> >
> > 73
> > Rick, DJ0IP
> >
> >
> > -----Original Message-----
> > From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of
> Andrew
> > Flessner
> > Sent: Sunday, February 10, 2013 7:50 PM
> > To: tentec@contesting.com
> > Subject: [TenTec] Open wire line
> >
> > When I considered what I could build for a single multiband
> antenna that
> > would fit on the apartment roof and reading as many sources of
> info I could,
> > including Maxwell, W2DU, I made a 132' doublet fed with 450 ladder
> line. I
> > later changed it to open wire with 4" spacing. It works very well
> on 80-6
> > meters, tuned with my 238 tuner. I do use a Balun Designs 4:1
> "tuner balun"
> > just outside the house with 10 ft of RG-213.
> >
> > Here are 3 sources for open wire line, there may be others. I
> built the
> > first because I had most of the parts.
> >
> > I think the True Ladder Line product probably makes the most
> sense based on
> > price/effort, etc.
> >
> > Andy K9ARM
> >
> > http://www.youtube.com/watch?v=FKGB6qkXs
> >
> > http://www.trueladderline.com/
> >
> > http://www.73cnc.com/product_p/ls100.htm
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
> >
>
> _______________________________________________
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>
>
> -----
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