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Re: [TowerTalk] Fwd: Strain releif for vertical coax

Subject: Re: [TowerTalk] Fwd: Strain releif for vertical coax
Date: Mon, 25 Aug 2008 00:04:51 -0500
List-post: <">>
Rod Cunningham wrote:
> wrote:
>> Hi Michael,
>> Dave, K1TTT, gave me the advice to tape the coax to the tower legs. Just  
>> plain, good, electric tape. You should, of course, us some flexible coax at 
>> the  
>> point when you need the flexibility for the rotation of the antenna and that 
>> has  to be movable, but the rest can just be taped in place. No, I wouldn't 
>> recommend  you to have the coax hanging along the boom but tape it there to. 
>> Naturally, you  should keep the tape tension "just right" so you don't make 
>> indentations in the  coax.
>> A story has it that when they installed the coax for a TV transmitter in  
>> Gothenburg, Sweden, they managed to put the cable clamps at just the right 
>> (or  
>> wrong) distance that the combined reflections from all the clamps came back 
>> in  
>> phase with a catastrophic result on the SWR. I don't know if the story is 
>> right  but I am sure if you clamp or tape the coax you will not manage to 
>> see a  
>> noticeable result on the SWR.
>> Good luck with your tower and antennas.
>> Hans, N2JFS

I black zip tied my 5 or 6 coaxes to the Rohn legs and they have 
lasted for about 4 yrs now.  but, what do you do with coax with a 
crank up tower.??  drop it inside the three 20' sections????


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