[TowerTalk] Vertical vs Beam

[Joe Subich, W4TV]

One can see the answers to most of these questions in 
the picture here: 
  http://tf.nist.gov/timefreq/images/radiostations/wwvh-large/wwvh5.jpg 

All of the verticals are similar in construction ... note the on 
ground radials are clearly visible below both antennas in the 
array. 

The use of radials to reduce ground losses with 1/2 wave verticals 
is independent of feed method (base vs. elevated vs. off center) and 
feed impedance (only effects matching method - not ground losses).  

73, 

   ... Joe, W4TV 
 


> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com] On Behalf Of Bill Aycock
> Sent: Monday, April 06, 2009 9:37 AM
> To: Michael Tope; N7mal
> Cc: towertalk at contesting.com; John Geiger; Robert Redmon
> Subject: Re: [TowerTalk] Vertical vs Beam
> 
> 
> As far as the subject of 1/2 wave verticals goes, the WWV 
> site leaves out a 
> LOT!
> 1. Where is the feed point?
> 2.  what is the feed point impedance?
> 3.  Are the lower ends of the "guys" grounded?
> 4. Why is it important that the Coax feeds do not cross?
> Does anyone know?
> Are the arrangements of the TTers with 1/2 wave verticals 
> like WWV, and if 
> not, why reference it?
> Bill--W4BSG
> 
> 
>     ----- Original Message ----- 
> From: "Michael Tope" <W4EF at dellroy.com>
> To: "N7mal" <n7mal at citlink.net>
> >
> >>----- Original Message -----
> >>From: N7mal
> >>To: John Geiger ; towertalk at contesting.com
> >>>>
> > WWV uses 1/2 wave verticals:
> >
> > http://tf.nist.gov/timefreq/stations/wwv.html
> >
> > 
> 
> 
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