That's right, in the C3x series the intermix is solved by the closed
cell for the driver, and the presence of the 20 reflector is solved by
having the 10 ref in front of the 20.
In W7WHY's case, though the 20 meter driver will not be part of a closed
cell. It will constitute a wild card in the field of the ten meter
portion with an unknown Z (feedline) as a center load.
-----------------
Guy Olinger
Apex, NC, USA
----- Original Message -----
From: "Pete Smith" <n4zr@contesting.com>
To: "TowerTalk" <towertalk@contesting.com>
Sent: Monday, August 20, 2001 1:19 AM
Subject: Re: [TowerTalk] Tri-bander question
>
> At 11:16 PM 8/19/01 -0400, Guy Olinger, K2AV wrote:
> >
> >No, it won't. Model it and you will see why. The twenty meter
elements
> >are coupled when operating the ten meter beam. You get very
interesting
> >10 meter current distributions and related detunings on the twenty
meter
> >elements.
> >
> >F12 puts the 10 meter section in front the twenty in the C3
> >
>
> Not really, at least in the C-3S. It uses a 10-meter reflector in
front of
> those for 15 and 20. I'm not sure how separately-fed driven elements
will
> work in close proximity, but I believe that the C-3 had that option at
one
> point.
>
> 73, Pete N4ZR
>
>
>
>
>
>
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>
List Sponsored by AN Wireless: AN Wireless handles Rohn tower systems,
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-----
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