[TowerTalk] Looking for a remote antenna switch

[Michael Goins]

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 at 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 at cis-broadband.com>
> To: Cal Zethmayr <w4gmh at cox.net>
> Cc: towertalk at 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 at cox.net
>>
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>>
>>
>>
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-- 
Michael Goins
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Mike
Pipe Creek, Texas
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