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Re: [TowerTalk] stacking monobanders

To: Doug Renwick <ve5ra@sasktel.net>
Subject: Re: [TowerTalk] stacking monobanders
From: David Gilbert <xdavid@cis-broadband.com>
Date: Tue, 28 Nov 2006 15:33:46 -0700
List-post: <mailto:towertalk@contesting.com>

Doug,


Anecdotal results from anywhere are irrelevant ... that was my point. I don't trust software analyses implicitly, but I trust them more than opinions that aren't backed by direct comparison of some sort (like an A vs B test of two antennas at the same height at the same time).

Yup ... well, close anyway. I used a fixed 2 element 40m wire yagi at 70 feet for a while. It worked great and I had a lot of fun with it. It would have worked even better at 90 feet, and it would have worked a whole lot worse at 45 feet like the original message from NY6DX discussed.

Dave AB7E



Doug Renwick wrote:
Dave,

Have you ever operated 40m from the northern latitudes?
Anecdotal results from a QTH in Arizona are irrelevant.
Have you ever used a 2L 40m beam at 60 feet?

Doug/VA5DX



I disagree with your disagreement ... hi.

Per my earlier message, there is 2db difference for a 2 element 40m yagi

at 60 feet versus 45 feet. That's about the same as the difference between a 2 element and a 3 element yagi. What I didn't mention before is that having a yagi too low also degrades the azimuth pattern and loses a lot of QRM rejection.

No offense meant, but anecdotal results don't help in making good antenna decisions. I've worked Bouvet with a short 40m vertical and 100

watts, and I've worked FR5 on 20m with 5 watts to a low vertical loop. Neither would be my preference for antennas. A QTH in VE5 might make my

wishlist for generating a pileup during a contest, though ;)

73,
Dave  AB7E



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