I'm supprised I haven't heard much duiscusion regarding Cable TV 75 ohm
burial cable. 75 ohms isn't too much to deal with, it's cheap or free, and
has the self sealing jacket. My tower is 200 feet back from the house, then
up another100 feet. I have two burried runs of the tv cable going back and
up the tower and one run of 50 ohm 7/8" hardline going back to the tower
base and another 100 feet ready to go up the tower. All have worked well
except for a bad 75 ohm termination which was not the cables fault. My
feeling would be that finding some used, clean 7/8" burial hardline would be
the ideal solution. Mine was free from a building that was being abandoned.
Sometimes you see it at flee markets, but it would probably be smart to take
along an analyzer so you could check it out.
Gene / W2LU
----- Original Message -----
From: "Rob Atkinson" <ranchorobbo@gmail.com>
To: <towertalk@contesting.com>
Sent: Saturday, November 28, 2009 7:34 AM
Subject: Re: [TowerTalk] Bumps in coax, choosing coax
>I have done business with Davis RF and based on that I think it is
> safe to say that they offer a quality product at a good price. Which
> brings me to the next point, to the ham who asked for advice on coax:
> If I were you I would forget about the Times Microwave cable and the
> 9913. If you are interested in quality and low loss there is only one
> way to go and that's with Andrew 1/2 inch heliax (LDF4-50). There is
> of course an initial investment, but it pays for itself over time. If
> you need a run that will last at least 20 years, that you can bury,
> drive over, step on, and not worry about, this is the feedline for
> you. Also, the connectors are waterproof. I advise checking the
> price per foot from Davis--I think you will be pleasantly surprised.
> It compares favorably with the prices for "made up" cables (ones with
> the connectors installed on them) from other vendors that are far
> inferior to Heliax. Sure you have to get the Andrew connectors and
> they aren't cheap, but you only have to buy them one time. Of course
> this cable only works if you have a feedpoint that is physically
> supported somehow. Once you use Heliax any notion of going back to
> anything else except for short jumpers will be unthinkable.
>
> 73
>
> Rob
> K5UJ
>
>
>
> <<<There are lots of whores in the cable business. Most are nothing but
> brokers
> -- they are buying and selling stuff they know nothing about, and buy low
> sell high is the only consideration. Most of it is junk. There are no real
> specs for performance, construction quality, or uniformity, and even if
> there were, these turkeys wouldn't know how to test for them. They are
> moving boxes.
>
> When you find "bumps" in new coax, you're dealing with JUNK coax. There's
> a
> REASON it's cheaper. Stick with REAL cable companies like Belden, Times,
> Gepco, and Commscope, who actually manufacture their own cable. IF you buy
> anything with someone else's name on it, it's probably a company that
> doesn't mfr it, but buys it either from a mfr or one of those whores.
> There
> is good private-label cable around, but there's a lot more junk. A few
> years
> ago, I bought some excellent transmitting-grade RG6 with Pasternak's name
> on
> it. Comparing it's physical characteristics to the Belden catalog, I'd
> guess
> that it came from the Belden factory. I've not dealt with Davis RF or seen
> any of their products, so can't comment on them. I've done biz with The
> Wireman and feel that I got good stuff. I've bought connectors from RF
> Connection and gotten junk. When I called to complain, I was told, "hams
> are
> cheap."
>
> If you don't buy Belden, Times, Gepco, or Commscope, make sure you buy it
> from a vendor you trust to 1) know the difference and 2) buy good stuff
> from
> quality mfrs.
>>>>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|