Hi Mark
From a home station perspective:
I have not noticed any significant degradation doing that here at 222 or 432.
If possible position the loop yagi so the loops are above the mast, i.e. with
the clamp just at the top of the pipe…again on 1296 and 902 no
pattern shift was noted here…
73 Dana VE3DS
> On Jun 26, 2015, at 10:37 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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