I've planned a 2 x 8 element yagi array with elevation. The antennas
will be vertically polarized
8-element antenna has 11 dBd gain and the boom length is 3.8 m. A pair
of these antennas would provide 14 dBd gain. I
would be able to benefit from long operating hours since the
array will point at the Moon as long as it is
visible. Elevation also
reduces terrestial noise, which is
strongest when the antennas are pointing at the horizon.
#2 draft on EME antennas
2016. I have reviewed the antenna design. The previous
draft had 2 x 8 element yagi. It required a 3 meter long center boom
made of steel tube. This kind of boom would be too heavy
for my KR-550 rotor. I am not sure the rotor can handle this weight.
new solution is using a 2 meter long wooden center boom (ash tree), and
fit 2 x 6
element yagis. This array will have less weight, and the wind
resistance will be lower. It will be easier for the KR-550 to
elevate it. The two yagis will be 6EL2
from the swedish company Vargarda
. Each antenna has 10 dBd gain,
and a pair will provide about 13 dBd gain. The antenna's boom
length is 2.25 m.