Looking for a remote antenna switch to use with a quad before too
long. Anyone have a reasonable one that is just sitting on a shelf,
unused?
mike, k5wmg
On Mon, Apr 6, 2009 at 12:17 PM, Mark Spencer <mspencer12345@yahoo.ca> wrote:
>
> You might want to consider the wind loading of the pipe vs cables ?
>
> I seem to recall seeing specs for towers that state the number of feed lines
> that can be attached to the tower legs. The wind load of a piece of pipe
> might be significantly more than a bundle of cables that can be easily pulled
> thru a given size pipe ?
>
>
>
> ----- Original Message ----
> From: David Gilbert <xdavid@cis-broadband.com>
> To: Cal Zethmayr <w4gmh@cox.net>
> Cc: towertalk@contesting.com
> Sent: Monday, April 6, 2009 10:09:08 AM
> Subject: Re: [TowerTalk] Co-ax and Rotor Control cables inside PVC?
>
>
>
> I'm not sure that the LMR400 would need it, but I've done the exact same
> thing for other cables (rotator control, etc). I wouldn't use thin wall
> PVC, though ... it generally has horrible UV performance and in the
> Arizona sun it becomes brittle and breaks in less than one year. At the
> very least I would recommend that you use the thicker Schedule 40 stuff
> .. it will discolor but otherwise holds up fairly well. The best choice
> would be to use gray electrical PVC conduit and it isn't much more
> expensive (Home Depot electrical department). The bell-shaped ends also
> make for easier coupling.
>
> 73,
> Dave AB7E
>
>
> Cal Zethmayr wrote:
>> 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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