I've already posted a copy of what N7CL posted to this group years ago. His
work, as well as the work of others, can also be found in ON4UN's "Low Band
DXing" starting on page 9-14 of the 5th edition. The answer is there.
Additionally see: "A Closer Look at Vertical Antennas With Elevated Ground
Systems" by Rudy Severns N6LF. He recommends 10-12 elevated radials as a minimum.
Wes N7WS
On 1/11/2022 2:15 PM, Lux, Jim wrote:
On 1/11/22 12:16 PM, Jim Brown wrote:
On 1/11/2022 2:04 AM, Ignacy Misztal wrote:
At my new QTH, initially I set up inv U about 80 ft high with 4 125 ft
elevated tuned radials about 10 feet high.
N6BT, who has done a LOT of work on the topic of elevated radials, told me
that 20 ft is a minimum height for 160M. When I raised mine from about 6 ft
to that height, TX signal improved significantly.
But what is the *reason* for it working better. Is it something as simple as
"the currents in the radials aren't loaded as heavily by something 20 feet
away as opposed to 6 feet away" in which case it's a sort of soft transition,
and "going higher" is a matter of diminishing returns.
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|