[TowerTalk] LMR degradation

[Gary Mayfield]

What are you supposed to put around the rotor then? 73,Joe kk0sd
 > From: Cqtestk4xs at aol.com
> Date: Tue, 26 Mar 2013 11:42:22 -0400
> To: TOWERTALK at contesting.com
> Subject: Re: [TowerTalk] LMR degradation
> 
> Back in the early 2000s I had a long conversation with the guys at  Times.  
> The ultra flex on many of my jumpers had cracked after only a  couple of 
> years in the FL sun.  His response was the ultraflex was not  supposed to be 
> used outside.  
>  
> He offered to replace the stuff with regular 400 but I never took him  up 
> on it.
>  
> I use the regular LMR 400 on all my jumpers and have had zero  problems.
>  
> Bill K4XS
>  
>  
> In a message dated 3/26/2013 1:25:47 P.M. Coordinated Universal Time,  
> k8ri at rogerhalstead.com writes:
> 
> On  3/25/2013 2:31 AM, Jim Brown wrote:
> > On 3/24/2013 9:42 PM, Jim Hoge  wrote:
> >> Today I discovered that I have had environmental ingress  beneath the
> >> outer jacket of some ~8 year old  LMR-400.
> >
> > In the latest (I think) version of his excellent  Managing Interstation
> > Interference," W2VJN notes that he observed  degradation in the measured
> > performance of stubs made of LMR400 that  had been sitting in his garage
> > for a bit less than a decade. He seemed  to think it was due todegraded
> > contact between the foil and braid  shields. This was written several
> > years ago. He may have more to say  about it by now.
> 
> We've known for years the UF versions of the LMR  cables deteriorate out 
> in the elements. It follows that they'd possibly do  so with age as well.
> 
> I found that the braid had almost disentegrated in  some pieces of 
> LMR400UF where the jacket "appeared" to syill be in good  shape.  I 
> thought perhaps the jacket had become porous, but perhaps  not?I wonder 
> which LMR400 he's talking about.
> 
> 73
> 
> Roger  (K8RI)
> 
> 
> >
> > 73, Jim K9YC
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