N2TK wrote:
> How are you going to support the coax going up the tower? Threaded through
> PVC you would only have support for the coax and control cables where they
> exit the PVC. I would prefer to support the cables with tape every few feet.
> With the quality of coax and control cables you can buy I don't see a need
> to thread the cables through PVC to protect the cables from the elements and
> sun. Plus if you want to add or change something it is a lot easier not to
> have to deal with the PVC.
Agreed. Some cheap rotator cables will eventually harden, but I've seen
even that stuff last 30 plus years. I'd think LMR-400 would be better
off being taped or strapped to a tower leg every few feet. You
certainly don't want it hanging by the connectors and 110 feet is a lot
of load for one of the cable hangers.
I run all mine through PVC underground to the tower for convenience,
then to a grounding bulkhead at the base and another at the top, but
they are tapped to the inside of the tower legs about every 3 feet going up.
73
Roger (K8RI)
> 73,
> N2TK, Tony
>
> -----Original Message-----
> From: towertalk-bounces@contesting.com
> [mailto:towertalk-bounces@contesting.com] On Behalf Of Cal Zethmayr
> Sent: Monday, April 06, 2009 12:06 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] Co-ax and Rotor Control cables inside PVC?
>
> I'm working on plans for my 110' tower to be installed early this summer.
>
> Considering installing some thin wall PVC pipe inside one corner of the
> tower from near the bottom to the area at the top where the rotor, and an
> Ameritron coax switch box will be mounted. Then put one run of LMR400 in
> it, the cables for the rotor and switch box control.
>
> Purpose: long term protection from any UV, weather etc.
>
> Top of tower will have a HF beam, 6 meter beam, and 2 meter quagi.
>
> Anyone else ever tried this? any ideas or reasons (other than the cost) not
> to try this?
>
> Cal Zethmayr
> W4GMH@cox.net
>
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