Something like an XM240 at 65 feet will easily beat a four square or a 3
element vertical. The take-off angle of the XM240 will be slightly
higher than the 4 square, but the XM240 will have more gain than the 4
square at all angles.
You can probably get away with putting an 80/160 vertical in the center
of a 40 meter 4 square, but there is one possibility that could mess it
up. If the transmission line to the 80/160 antenna happens to look like
an open stub on 40 (for example half wave on 40 with the far end open)
then the unused 80/160 will resonate on 40 and destroy the 4 square
pattern. Avoid this situation and you should be OK.
Tony Osman wrote:
>I have watched with great interest, all the debates that have taken
>place on this reflector and now I have a question to pose to the many
>knowledgeable people here. I am looking to put up low band antennas
>with the primary focus on Contesting and Dxing. I do not have a huge
>lot, but do have about 100ft by 200ft available that runs NE/SW in the
>longer direction. My first question is: Which would be the better
>array for 40m - four square or 3 element vertical array? (My tower will
>only be at 65ft and I think either of these arrays will be better than a
>shorty 40m beam). Second question: Would there be any ill-effect if I
>put a centre element in the four square that is trapped for 80/160m.
>Looking to have a 65ft vertical for 80m that is trapped at the top to
>allow top loading via wires for 160m. Distance from centre of all of
>this would be approx 100ft from house.
>TowerTalk mailing list
TowerTalk mailing list