[TowerTalk] 1/2w vertical v. 1/2w horizontal

[Jim Brown]

Very nice design.  

>Here's the URL for Peter Viezbicke's description of the WWV HF 
>antennas:

>http://tf.nist.gov/timefreq/general/pdf/1420.pdf

Toward the end of the following Power Point (pages 64-69) is 
another design for a half wave center-fed vertical. I got the idea 
from Rudy Severns, N6LF, who shows a similar design on his 
website, but with a simpler choke terminating the bottom half of 
the dipole. 

http://audiosystemsgroup.com/NCDXACoaxChokesPPT.pdf

The original question was, how does this antenna compare to a 
horizontal one? There are computed NEC predictions in the Power 
Point. They correspond rather well to on-the-air comparisons with 
my horizontal dipoles. There are NO radials under this vertical. 
There are photos to show how it is rigged. 

The pdf below compares a good quarter-wave vertical with a good 
dipole using NEC predictions. The models correspond pretty well 
with on-the-air observations on 160 meters. There ARE a lot of 
radials under the 160M vertical, and I plan to rig an 80M over the 
same radials.  

http://audiosystemsgroup.com/ComparingVerticalsandDipoles.pdf

73,

Jim Brown K9YC