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Re: [TowerTalk] Preferred type of coax to be used for jumpers in a multi

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Preferred type of coax to be used for jumpers in a multi-operator room ?
From: Jim Brown <jim@audiosystemsgroup.com>
Reply-to: jim@audiosystemsgroup.com
Date: Wed, 4 Sep 2019 12:54:18 -0700
List-post: <mailto:towertalk@contesting.com>
Yes. I have no means of measuring this, but based on the physics and assuming equal quality and equal density of the braid, I would expect the larger coax to have better shielding.

73, Jim K9YC

On 9/4/2019 12:31 PM, Gedas wrote:
It will depend on who makes the cables you are comparing. If both are M17 rated then both should be double shielded and use silver coated copper conductors which is good but some manufactures may use 95% braid coverage while some may use less. Some may use 95% for both shields others may use 95% for the outer and less for the inner. Also the angle of the weave also affects the shielding effectiveness. This SE will also vary with frequency. But in general, esp for HF use, you will find both to have similar shielding performance as long as you stick to a known trusted & respected name brand. Also keep in mind the dielectrics are totally different between the two.

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