[TowerTalk] LMR degradation

[Cqtestk4xs at aol.com]

Like I said in my post I've been using regular LMR 400 for years on many  
antennas.  Never had a failure if you leave a good sized loop.
 
Bill K4XS
 
 
In a message dated 3/27/2013 2:37:48 A.M. Coordinated Universal Time,  
gary_mayfield at hotmail.com writes:

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
> > _______________________________________________
>  >
> >
> >
> >  _______________________________________________
> > TowerTalk mailing  list
> > TowerTalk at contesting.com
> >  http://lists.contesting.com/mailman/listinfo/towertalk
> 
>  
> _______________________________________________
> 
>  
> 
> _______________________________________________
>  TowerTalk mailing list
> TowerTalk at contesting.com
>  http://lists.contesting.com/mailman/listinfo/towertalk
> 
>  _______________________________________________
> 
> 
>  
> _______________________________________________
> TowerTalk  mailing list
> TowerTalk at contesting.com
>  http://lists.contesting.com/mailman/listinfo/towertalk


=