[TowerTalk] The Need for Grounding

[Robert Harmon]

Thanks guys,  I will attach the ground screen to the bottom of the tower 
also.
I see your plan of sloping the elevated radials up from the base until 
their elevated height, Jim.  I will try this.
I read that some broadcast station antennas use radials and a ground 
screen both to improve their radiation.
That's where I came up with the idea to try them both.  I may be just 
fine with 4 elevated radials and not see
any appreciable improvement with the ground screen added, but it will be 
fun finding out  :-)

thanks
Bob
K6UJ

On 1/14/16 10:34 AM, Jim Brown wrote:
> On Thu,1/14/2016 9:45 AM, David Robbins wrote:
>> what is the intended purpose of said ground screen not being 
>> connected to the tower.  if you area going to shuntfeed the tower 
>> then you want the ground screen as big as you can make it and 
>> attached securely to the tower.
>
> Right. And they SHOULD be bonded to the mesh in the slab. The question 
> is, the usefulness of elevated radials on a grounded tower. To take 
> advantage of their elevation, they must be bonded to the tower. I 
> would bond them at the base, sloping them up from that point to their 
> elevated height as they extend from the tower. But they will, by 
> virtue of their height, reduce somewhat the effective height of the 
> antenna. I'm going from N6LF's excellent work on the subject, and by 
> modeling. I'd pay attention contrary advice from guys like K1TTT and 
> W3LPL.
>
> 73, Jim K9YC
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