Date: Mon, 2 Feb 2015 10:40:53 -0000
From: "Doug Turnbull" <turnbull@net1.ie>
To: "'Jim Thomson'" <jim.thom@telus.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Beverage Antenna
### You did the maths wrong. ONE wavelength is 984 / F ...or
984 / 1.832 = 537.11 feet. 537.11 / 20 = 26.86 feet.
## 26.86 feet is the max height u could go on 160 m.
13.43 feet is the max you could go on 80m.
6.72 feet is the max for 40m.
## So 13.43 would work for both 160+ 80m.
Flip side is 2 wavelengths on 160m is 4 wavelengths on 80, etc.
## so it’s a bunch of tradeoffs, depending on bands covered, length of
beverage etc.
I have zero experience with beverages...so don’t know if a beverage would work
any better
than a 80m rotary dipole or not..on RX. I cant see any beverage working
better than a 40m yagi either.
## If u were using 4 squares on 160-80-40m.... the beverage would be the
ticket on RX.
You don’t see too many 40m 4 square arrays.....they usually don’t do as good as
a 40m yagi.
Jim VE7RF
Dear OMs,
This is the maximum height and 0.05 is 1/20 so you should have a
maximum height of 13 feet. Not many people use the Beverages this high -
they may work but is performance impaired? The w8JI article is a good one.
73 Doug EI2CN
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim
Thomson
Sent: 02 February 2015 05:02
To: towertalk@contesting.com
Subject: [TowerTalk] Beverage Antenna
Date: Sun, 1 Feb 2015 01:47:06 +0000
From: <samsadventure@gmail.com>
To: Don <w7wll@arrl.net>, Towertalk <towertalk@contesting.com>
Subject: Re: [TowerTalk] Beverage Antenna
read here: http://www.w8ji.com/beverages.htm
## JI claims that max beverage height should be .05 wavelength.
That implies 26.86 feet. 492 / 1.832 = 268.55 feet.
268.55 / 10 = 26.86 feet.
## It would be interesting to know if you could use an existing
6 ft tall fence line and strap a 8-15 ft tall pvc tube to each
wooden fence post. At that height, it would be a bitch to install
the beverage wire. An orchard ladder might work.
Jim VE7RF
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