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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