Im also on a hilltop with a 500' drop in 1/4 to 1/2 mile and for a single
antenna 60-70 was optimum on 20M and less on 15/10 in the same ratio. Those
heights put the maximum elevation angles RF to where it did the most
good...most of the time
With 4 high stacks on 3 bands the lower pair was proving the validity as the
40/80' pair on 20 was most always best to where the most DX was
worked...Europe. Same on 10 at 25/50' and 15 at 30/60'. Switching to the
upper pair at 120/160' or all 4 were used as needed for multipliers and
working different directions since all were independently rotatable.
For other parts of the country you need to look at the software.
Having the lowest one rotatable had its own benefit (-;
Carl
KM1H
----- Original Message -----
From: <donroden@hiwaay.net>
To: <amps@contesting.com>
Sent: Wednesday, March 12, 2014 4:32 PM
Subject: Re: [Amps] been dead here
OK..... slow day ... To the Big Gunners out there ....
KT36XA tribander. what is the optimum height between ground level and
140m feet ?
A ring rotor at 70 feet, or all the way to the top ?
I'm on a knife edge of a ridge 1000 feet above the city... less than a
quarter mile from the drop-off over 270m degrees of rotation, so does
ground reflection even come into play ?
Don W4DNR
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Version: 2014.0.4336 / Virus Database: 3722/7184 - Release Date: 03/12/14
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