[TowerTalk] Pulling LMR-600 in Conduit

John Simmons jasimmons at pinewooddata.com
Thu May 5 14:32:07 EDT 2016


I used a shop vac in reverse on the far end. The suction helps pull the 
cable(s). Fashion a loose-fitting wad to the front end of the cable.

-John NI0K
> Michael Murphy <mailto:mike at ki8r.com>
> Thursday, May 05, 2016 12:06 PM
> I pulled a single run on LMR 600 along with a HD rotor cable and control
> cable for the Coax Switch through 210 feet of 4". No lube. It came
> through just fine. But 200+ feet is a lot of pulling after you have 
> been on
> the tower all day.
>
> See https://ki8r.com/tower-project/
>
>
>
> On Thu, May 5, 2016 at 12:32 PM, Roger (K8RI) on TT <
>
>
>
> Roger (K8RI) on TT <mailto:K8RI-on-TowerTalk at tm.net>
> Thursday, May 05, 2016 11:32 AM
> 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)
>
>
>
>
>
> RCM <mailto:robrk at nidhog.net>
> Wednesday, May 04, 2016 7:43 PM
>
> It will go just fine, until the last two feet…. use lube.
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> Jerry Gardner <mailto:jerryw6uv at gmail.com>
> Wednesday, May 04, 2016 5:37 PM
> I have a 160 foot length of 2" PVC conduit between my tower and shack. I
> want to replace the existing coax in the conduit with LMR-600.
>
> The current coax is Buryflex and I had no problems pulling it through the
> conduit. I didn't need to use any lubricant. The conduit has one 90 degree
> bend and two 45 degree bends.
>
> Am I likely to encounter any difficulties pulling LMR-600 through this
> conduit? It seems much stiffer than the Buryflex.
>
> 73,
> Jerry
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