Re: [TowerTalk] Crappy LMR600

["Roger (K8RI) on TT" <K8RI-on-TowerTalk@tm.net>]

Over 20 years, I've never seen jacket deterioration on LMR cables. UF 
OTOH didn't last 6 years used as pigtails and rotator loops.
15 plus years for UF is really difficult to imagine. That exceeds the 
manufacturer's projected life (10 yrs) and  by 50% and experienced life 
(5 to 6 years) by 200 to 400%
73, Roger (K8RI)


On 8/23/2017 Wednesday 10:16 PM, J. Hunt via TowerTalk wrote:
> I've read some posts of late of LMR400 and LMR600 outer jacket deterioration 
> over the last several years.
> I am curious if the manufactured outer jacket formula has changed over the 
> years.
>
> I have some LMR400 ultra-flex on my personal radio tower - installed 15+ years 
> ago at the rotor flex point, and it has not cracked or dried up yet.
>
> Any information would be greatly appreciated from product made 15 years ago.... 
> until of recent years.
>
> Thanks,
> James
> ki5dq
> --------------------------------------------
> On Wed, 8/23/17,  <john@kk9a.com> wrote:
>
>   Subject: Re: [TowerTalk] Crappy LMR600
>   To: towertalk@contesting.com
>   Date: Wednesday, August 23, 2017, 9:07 PM
>   
>   I use FSJ4 for outdoor jumpers however I cannot imagine that it would be good for a rotating antennas.  It
>   is not flexible like RG213 and the PVC jacket is somewhat thin.
>   
>   John KK9A
>   
>   
>   To:    "'Tower Talk'" <towertalk@contesting.com>
>   Subject:    Re: [TowerTalk] Crappy LMR600
>   From:    "Mike & Becca Krzystyniak" <k9mk@flash.net>
>   Date:    Wed, 23 Aug 2017 15:04:59 -0500
>   List-post:    <mailto:towertalk@contesting.com> Bill  etal,
>   
>   
>   I have also used SuperFlex in rotor loops but over time I had one crack along the annular shield rings, opening
>   the shield.
>   Not sure if that was a one off, or something attributable to the SuperFlex 
> construction.
>   At the time I decided to replaced them all but I am reconsidering SF vs. UF.
>    
>   Mike K9MK
>   
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--

73

Roger (K8RI)


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