In article ,
"Steve Lusardi" wrote:

Another important fact
about 6' radiators is that the vertical fan is close to 20 degrees, as
opposed to a 4' radiator's 30 degree fan. If, as in my case, mounting the
antenna on an aft bridge, it means that a 6' radiator will not radiate the
center cockpit and a 4' will.

Ok Steve, Please tell us all about why this would be important.
Actually, the Vertical Beam-width of a ANY Slot-line Radar Antenna, is
NOT related to the length of the Antenna, at all, but IS related to the
design of the Slot-line shielding, and slot-line position inside the
shielding. If you look at the Furuno Antenna Spec's you will notice
that ALL the Slot-Line Antennas, have a 25° Vertical Beam-width, and
have had since Furuno first Started importing their products to the
USA, back in the KRA-121 days.

--
Bruce in alaska
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