It should have minimal effect. On my portable operations I stack 144, 222,
432, 903 and 1296 MHz antennas on one metal mast about 2 to 2.5 feet apart.
They don't even show a change in SWR. I have used these individually on the
same mast and haven't noticed any difference in performance.
I hold the coax cables against the mast with velcro cable ties. Easy to put
on and take off, water doesn't affect them, etc.
73, Zack W9SZ
On Fri, Jun 26, 2015 at 9:37 PM, Mark Spencer <mark@alignedsolutions.com>
wrote:
> Hi. I'm pondering my likely roving / portable antenna setup for the UHF
> contest and am thinking of mounting a 432 yagi below a 1296 loop yagi.
>
> Does any one have any practical experience they can share re running a
> metallic 1.5" to 2" mast (plus another feed line) thru a 432 MHz horizontal
> yagi. The antenna in question will be the a M2 21 element 432 antenna
> which would be centre mounted on the mast. The antenna at the top of the
> stack will be directive systems 55 element 1296 loop yagi.
>
> I'll probably just try this at home before August but thought I would ask
> for comments first. It seems like a lot of metal to run thru the pattern
> of the 432 yagi. I'm thinking this is probably not going to work out very
> well but it would simplify the station set up. In the past I've just run
> one antenna per mast to avoid having to deal with this and I may end up
> just running separate masts for 432 and 1296 and forgoing the other bands.
>
> Any comments are welcome.
>
> Regards
> Mark S
> VE7AFZ
>
>
> Sent from my iPhone
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