[TowerTalk] Crappy LMR600

[Dan Starkenburg]

The DB-series of Times Microwave coax is injected with goo to prevent moisture ingress in the event the outer jacket gets nicked.  That being said, it's a bear to dress the cable for the connectors to be installed.  Tools get sticky.  Little pieces of the outer braid stick all over the place.  I've used LMR-400-DB a few times in the past and have since decided "ain't nobody got time for that" unless the coax run is actually getting directly buried (tis the "DB" nomenclature).
73, Dan / ab0re

On Wednesday, August 23, 2017, 5:51:38 PM CDT, Clay Autery <cautery at montac.com> wrote:

Curious as to why y'all don't use the LMR-400-DB or LMR-xxx-DB cable
INTENDED for exterior use?

______________________
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 8/23/2017 3:04 PM, Mike & Becca Krzystyniak wrote:
> Bill  etal,
>
> I had some LMR-600-UF going to several UHF antennas on a rotating tower.  
> It showed signs of sun damage and the outer jacket crinkle cracked on me
> too.  
> The salesman warned me upfront it might not make 10 years.
>  
> But even cracked with some exposure to the shield, the integrity of the coax
> (loss & Z) was still in spec.
> IIRC, I actually found a footnote on the LMR site that UF was not intended
> for outdoors, but it will survive for a number of years.
>
> Bill, YMMV but the Jafa-Tek specs are not the same as LMR-xxx.  
> But for jumpers it's probably in that bucket called diminishing returns.
>
> 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

_______________________________________________



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