Complex yes, but probably less complex than two sets of elements and trying
to deal with the interactions. Essentially, you'd wind up with a big
multipole relay to switch between two sets of tuning networks. Does he
really need to run two bands simultaneously? If so, it's a bit trickier,
but then again, it would be no tougher (probably easier, in fact) than a
diplexer for the 600 kHz spacing on a repeater.
Not something I'd care to try to "design by rule" though. I'd build the
array, then measure the Zs, then synthesize the networks. A good set of
test equipment would also be essential.
----- Original Message -----
From: "Tom Rauch" <w8ji@contesting.com>
To: "w7xu" <w7xu@iw.net>; <towertalk@contesting.com>
Sent: Sunday, June 13, 2004 7:08 PM
Subject: Re: [TowerTalk] 80 4-square inside a 160 4-square? Pros
andConsplease!
> Hi Arlis,
>
> That would work, but he wants to use two bands at one time.
> It would wind up being pretty complex, but workable.
>
> 73, Tom W8JI
>
> ----- Original Message -----
> From: "w7xu" <w7xu@iw.net>
> To: <towertalk@contesting.com>
> Sent: Sunday, June 13, 2004 6:42 PM
> Subject: Re: [TowerTalk] 80 4-square inside a 160 4-square?
> Pros andConsplease!
>
>
> > At the risk of making a foolish suggestion, why couldn't
> you build
> > a 4-square made up of conical monopoles, wherein each
> antenna would
> > cover both 160 and 80? The antennas would be spaced
> 1/4-wavelength
> > on 80 and 1/8-wavelength on 160. Then switch in/out
> separate phasing
> > lines for the 2 bands.
> >
> > 73 and awaiting replies from the educated,
> >
> > Arliss W7XU
> > _______________________________________________
> >
> > See: http://www.mscomputer.com for "Self Supporting
> Towers", "Wireless Weather Stations", and lot's more. Call
> Toll Free, 1-800-333-9041 with any questions and ask for
> Sherman, W2FLA.
> >
> > _______________________________________________
> > TowerTalk mailing list
> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
>
>
> _______________________________________________
>
> See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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