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Re: [TowerTalk] LMR600 male DIN

To: towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] LMR600 male DIN
From: Steve Maki <lists@oakcom.org>
Date: Sat, 10 Sep 2016 08:36:25 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Yes it is. It's weird how they include the word Heliax in the title since it's not Heliax.

But even with the aforementioned caveats about smooth wall hardline, the stuff has one really valuable characteristic - there are no voids for water to get into. The center conductor is solid even on the big stuff, and the dielectric is bonded to both the center conductor and shield. You can leave an open end out in the weather for years and it will still be a pristine piece of cable when you're ready to terminate it.

The best smooth wall has a copper shield and copper clad AL center conductor, but you don't see that much anymore.

-Steve K8LX

On 9/9/2016 19:56 PM, Bob K6UJ wrote:

Steve,

For a newbie to these cables, is this an example of the smooth wall
aluminum hard line you are talking about ?

https://www.tessco.com/products/displayProductInfo.do?sku=452440

On 9/9/16 4:16 PM, Steve Maki wrote:
On 9/9/2016 13:05 PM, Jim Brown wrote:

John,

FWIW, I find LDF4 very reasonable to handle.

Yes, and so does almost everyone who uses it on a regular basis. It's
very robust, and takes some serious abuse to damage it. I've seen both
LDF4 and LDF5 run over by cars on pavement with nary a dent.

I'm sure the thinner shield AVA5 or equivalent would be squashed in
that scenario.

  The "hard line" I find quite
delicate are the varieties designed for use in CATV systems. I've got
some and I'm using it on two monobanders, but it requires VERY careful
handling. What I have is 1/2-in, 75 ohms, Cu-coated Al center, Al
shield, so it's very easy to kink.

Yes, and smooth wall 50 ohm aluminum hardline is the same, quite
fragile. In particular you must be EXTREMELY careful not to nick the
shield while installing a ground kit. A nick will turn into a complete
break of the shield as soon as you bend the cable near the ground kit.
We learned the hard way of course.

-Steve K8LX

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