[Antennas] 1/4 WL verticals w/radials vs. 1/2 WL Verticals fed 'off-center'

[Dan Richardson]

At 01:10 PM 8/18/2002 -0700, Jim wrote:
>I would greatly appreciate a short recap of the theory and practice relating
>to the need for radials like these newer so-called '1/2 WL' verticals.
>Especially as it relates to some of the ones claiming to be fed 'off-center'
>while also using 'shortened' radials or a 'counterpoise'.


Without getting into the pros and cons of the no radial antennas you might 
consider this: WWVH uses a pair of center fed vertical dipoles on 15 MHz 
and they have added ground a radial system to the antenna for better 
performance. You can see a picture of the antenna at 
http://www.boulder.nist.gov/timefreq/images/radiostations/wwvh-large/wwvh5.jpg 
If you look close you can see the ground radials in the photo.

So while these antennas (sans radials) will "work" is seems that they work 
better with a radial system.  Just some food for thought.

Danny, K6MHE