Timely discussion for me. I am planning on getting a 4 element 20M yagi.What
do you think of the OP-DES yagi that Innovation Antennas has ?
It also has a 50 ohm feed as does the OWA. They state in their descriptionthat
it does not broadband as well as the OWA but it has better performance
( I assume they are talking about gain)In my case I want the yagi for only the
CW end of 20. Maybe the OP-DES
would be a good choice.
From what I understand I can do better than a conventional 4 element yagiwith
one of these newer designs.
BobK6UJ
From: "john@kk9a.com" <john@kk9a.com>
To: towertalk@contesting.com
Sent: Friday, February 3, 2017 4:57 AM
Subject: Re: [TowerTalk] Elements of a yagi
Assuming that you do not have too few elements and it is not very poorly
designed, gain is closely related to boom length as you stated. In the
early days it seemed that N6BT and WA3FET added the extra element to
achieve OWA however it is not always necessary. This is specially true
with larger Yagis where the directors can have considerable spacing. I got
rid of my hairpin matches years ago and have not looked back.
John KK9A
To: <towertalk@contesting.com>
Subject: [TowerTalk] Elements of a yagi
From: "Ed Sawyer" <sawyered@earthlink.net>
Reply-to: sawyered@earthlink.net
Date: Fri, 3 Feb 2017 06:15:31 -0500
Gain is pretty much about boom length to a large extent with element
strategy tweaking up and down off that macro number. You can usually
compare an OWA yagi and a traditional yagi by subtracting one element from
the count of the OWA assuming the boom length is pretty much the same.
Sometimes there seems to be implied confusion about the above the way people
describe yagis.
73
Ed N1UR
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