TT:
Permit me to add to the recommendations to read (and even purchase) the
N0AX/K7LXC books. I referred to their Yagi book prior to my ordering my
Bencher Skyhawk triband Yagi in 1999. Based on my experience with the
antenna, the book was spot on.
73 de
Gene Smar AD3F
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Gary
Sent: Saturday, October 17, 2020 11:44 AM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Greyline Performance antennas
I have the N0AX/K7LXC books. As Jim states they are excellent. All of their
vertical tests were done with an extensive radial field. Even the antennas
that claim to not need radials.
I understand the reasoning for why they did what they did as explained in
the book.
Has anyone done a similar test looking at a verticals without radials?
Thanks and 73,
Gary "Joe" kk0sd
-----Original Message-----
From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Jim Brown
Sent: Friday, October 16, 2020 11:51 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Greyline Performance antennas
On 10/16/2020 6:40 PM, Larry B. via TowerTalk wrote:
> I believed their PR copy that radials were not needed.
A point of clarification. There ARE a number of monoband and multiband
vertical dipoles with decent performance, and as a class of antenna,
vertical dipoles do NOT need radials. Most of them use some form of loading
and lots of matching tricks. Hy-Gain AV-series and Cushcraft R-series are
vertical dipoles. First rate antenna designer N6BT has designed a lot of
vertical dipoles, first for his Force 12 company, and for his current
company, Next Generation Antennas.
There are several tutorials on vertical antennas on my website.
http://k9yc.com/VerticalHeight.pdf
http://k9yc.com/AntennaPlanning.pdf
N0AX, since 2010 the editor of the ARRL Handbook and Antenna Book, and
K7LXC, master tower climber, performed setup and on-air measurement of a
dozen or so verticals and about that number of multiband Yagis, and produced
excellent reports. Their test methods were excellent, and so were their
written reports. They can be purchased online from K7LXC's website, Champion
Radio. I strongly recommend both.
I also strongly recommend N6BT's "Array of Light," which is a sort of
compendium of several years worth of his technical writing about antennas,
and includes details for several dozen of his Force 12 designs. It's
particularly good on antenna theory, design concepts, and at debunking
deceptive advertising claims. Tom's book is now sold by ARRL.
73, Jim K9YC
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