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THE STANDARD SETS ARE 40 FOOT TALL. GRA-4 HAS BEEN IN SERVICE SINCE 1951 AND MAY HAVE BEEN IN USE BEFORE THAT. THERE HAVE BEEN A NUMBER OF MODIFICATIONS AND VERSIONS, BUT SOME PARTS HAVE REMAINED THE SAME THRU SEVERAL DECADES OF USE. MAST SECTION AB-85 IS 3 FOOT LONG AND USES 16 SECTIONS IN ONE SET.
s. The two g. ups differ as follows:Mast Section. Antenna Group AN/GRA-4 contains two Antenna Mast Assemblies AB-86/GRA-4, and Antenna Group AN/GRA-12 contains thr. Antenna Mast Assemblies AB86/GRA-4. Antenna Group AN/GRA-12 is designed primarily to make a center-fed Hertz antenna. nly, using all t.
11 paź 2024 · The AB-86/GRA-4 is a 40 foot mast primarily used for supporting wire antennas. The mast consists of sixteen AB-85/GRA-4 3 foot long sections that are guyed at three levels with adjustable rope guys.
5 dni temu · The AB-155 is a 40 foot mast primarily used for supporting wire antennas. The mast is sometimes referred to as the AB-155/GRA-4. The mast consists of eight MS-44 5 foot long sections that are guyed at three levels with adjustable rope guys.
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