[TowerTalk] Beverage Antenna

[Jim Thomson]

Date: Mon, 2 Feb 2015 10:40:53 -0000
From: "Doug Turnbull" <turnbull at net1.ie>
To: "'Jim Thomson'" <jim.thom at telus.net>, <towertalk at 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 at contesting.com] On Behalf Of Jim
Thomson
Sent: 02 February 2015 05:02
To: towertalk at contesting.com
Subject: [TowerTalk] Beverage Antenna

Date: Sun, 1 Feb 2015 01:47:06 +0000
From: <samsadventure at gmail.com>
To: Don <w7wll at arrl.net>, Towertalk <towertalk at 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