These are logical stacking distances and will definitely work well for
most stations. Most of us do not have dedicated towers for each band and
we have to adjust the spacing and heights to clear guy wires and other
antennas. Fortunately spacing distance is not overly critical. I use
similar but slightly larger spacing and similar low antenna heights to
K3LR except on 40m.
John KK9A
To: <k1ttt@arrl.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Stacking question - another reality data point
From: "Tim Duffy" <k3lr@k3lr.com>
Reply-to: k3lr@k3lr.com
Date: Tue, 9 Aug 2016 21:06:54 -0400
I have 41 years experience in stacking 2, 3 and 4 Yagi's high.
After many hours behind the HFTA and NEC model engines - then putting Yagi's
up in the air and using them for many years here at K3LR - these are the
stacking distances that have worked very well at this Western PA QTH:
Lowest Yagi height:
40 meters - 118 feet
20 meters - 50 feet
15 meters - 40 feet
10 meters - 33 feet
Then - stacking distances by band:
40 meters - 72 feet
20 meters - 60 feet
15 meters - 40 feet
10 meters - 33 feet
All OWA Yagi's on all bands at K3LR have booms that are 48 feet long (it
makes a difference).
73,
Tim K3LR
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