Mike Powell wrote:
"I used to do it for microwave links by plotting the paths on "4/3"
paper."

Shows that different folks use different strokes. I alwaws used K=2/3
paper. This is quite pessimistic, but my paths usually worked under
propagation conditions (early morning hours when the fog sets in) that
bent the lines of wave travel away from the earth.

I also tried hard to keep distance between repeaters closer to 20 miles
than to 30 miles. Also, when I had a choice, between 2 GHz and 6 GHz, I
chose 2 GHz.

Best regards, Richard Harrison, KB5WZI