I think our main disagreement comes over the the maximum
angle that is supported on 10M. I believe that to be around
20 degrees (at very high MUF's).
Some time ago, someone plotted his 10M SS contacts on
a map. The vast majority were at skip distances of 900 miles
or more, which corresponds to takeoff angles of 20 degrees
At 18 ft, a 3L 10M Yagi has the majority of it's radiation between
20 and 30 degrees. 3 dB points are 15 and 40 degrees. Over
80% of the energy is above 20 degrees, i.e. going into outer space.
At 35 ft, the 3 dB points are 7 and 22 degrees with the vast
majority of the energy falling in the range of angles supported
by the ionosphere. I see NO BENEFIT in going lower than
35 ft on 10M.
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit: