On 3/3/2024 11:53 AM, Brian Beezley wrote:
It's intended to predict propagation for AM broadcast signals over broad
areas
Yes. My memory is that it was derived by running radials from existing
stations and noting the rate of decay of their field strength. As a
young EE student in the early '60s, I worked in the office of Pete
Johnson, who along with Carl Smith, wrote the AM technical Rules after
WWII, and used those maps to plot contours for his designs.
73, Jim K9YC
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|