[TowerTalk] Pulling LMR-600 in Conduit

[Roger (K8RI) on TT]

I have 2 runs of LMR600 from the house to the tower and 2 runs from the 
shop to the tower. A total of 4 runs through PVC conduit
The last photo on http://www.rogerhalstead.com/ham_files/cablebox.htm 
shows the LMR600 from the shop into the junction box on the tower.  I 
used a lot of wire pulling lube/soap. I use sweep 45s instead of 90s.

Yes, LMR600 is much more rigid than BuryFlex, but it pulls through 3" 
PVC conduit if there are no sharp bends. Use sweep 45s instead of 90s.  
LMR600 is more rigid than LMR400.  There is an Ultra Flex version of LMR 
400 and 600,  The LMR400UF is notably more flexible than BuryFlex(TM), 
BUT the jacket is a rubber like material that does not stand up well 
when exposed to the elements.  It has a quoted life of 10 years, or half 
that of standard LMR400 and 600s 20 years.  I've found the UF versions 
failed after only 5 or 6 years as rotator loops.  I had 5 lengths of 
LMR400UF used as rotator loops and leads from the top of the tower to 
the antennas. The jacket on 4 of those actually split while the 5th 
"looked" to be OK so I decided to make jumpers for the station.  When 
installing connectors, I found the Al shield and braid to be badly 
corroded.  The jacket had become porous and I was seeing water damage.  
The jacket on the regular LMR 400 and 600 is tough, but not so for the 
UF versions.

I used LMR600UF in the conduit to the house to see how well it stands up 
inside of conduit protected from the elements.

73

Roger (K8RI)


On 5/4/2016 Wednesday 8:43 PM, RCM wrote:
>> Am I likely to encounter any difficulties pulling LMR-600 through this
>> conduit? It seems much stiffer than the Buryflex.
>>
>> 73,
>> Jerry
>> _______________________________________________
>>
> It will go just fine, until the last two feet…. use lube.
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-- 

73

Roger (K8RI)


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