Bill K9RZ asked:
>I know this has been discussed at length before, but I can't seem to find
>specifics in the archives. I have just completed installing the Cushcraft
>40-2CD 12 feet up the mast above the top of the tower. I plan on
installing
>the KLM KT-34XA this weekend, right at the top of the tower. With the 12
ft
>spacing, do I need to be concerned enough with interaction between the two
>antennas that I should rotate them 90 degrees apart, or is this spacing
>sufficient to permit them to be aligned in the same direction?
>
12 feet will do alright. Mine is only 8'. The interaction will be 15
meters on the KLM not 40 meters on the Cushcraft.
I will make one suggestion. Most of us have found that putting the 40
meter beam on top is best. I ran a 40 meter beam on the bottom for 12 years
and putting the 40 on top does two things. First it gets the 40 meter beam
higher. Second the KLM has a smaller electrical footprint so there is less
interaction and less artificial ground for the tri-bander to look at. I
realize the second reason is hard to prove but in my case both antennas work
better and with 12 feet will be very close to having the beams by themselves
on separate towers.
73 Dave K4JRB
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