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Re: [TowerTalk] Triband Stacking Distance or antenna height?

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Subject: Re: [TowerTalk] Triband Stacking Distance or antenna height?
From: Richard Thorne <rthorne@rthorne.net>
Date: Tue, 24 Feb 2015 09:21:45 -0600
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Thanks for the replies,

I reminded myself that the C31XR has modeled performance information on different stack configurations which will help with stacking distance.

I really don't have a lot of options as my tower will be guyed at 3 points, 47', 87' and 127'. Based on the manual and the work WN9O did, 40' stacking distance is probably the best bet for the C31's. I'll mount them at 48', 88' and 128'. That will leave me 10+ feet to mount a 40m yagi and possibly a rotating dipole for 80/75.

Rich - N5ZC

On 2/23/2015 1:43 PM, Richard Thorne wrote:
I've been following the mail on this subject.

I'm going to start my new tower this summer. The base and anchors are already in. It's going to be a 137' rotating 55g tower with three F12 C31XR's stacked.

I've been using HFTA to come up with the best compromise heights (compromise as I'm trying to get the best results on all 3 bands).

Then it dawned on me. Should I be worried about stacking results or individual heights. Isn't the height of an antenna for a specific band at a certain time of day more of an advantage than the combined stacking?, and of course it's still a compromise since we're talking about tribanders. Don't get me wrong, I'm still going to try to come up with the best stacking distances for my location, but it seems to me that the most important feature of a stack is having 3 different heights to choose from, isn't it?

I sure wish the project was finished, it would have come in handy this past weekend.

Rich - N5ZC
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