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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.
16 kwi 2019 · antenna groups an/gra-4 and an/gra-12 19 april 1961. tm 11-5985-231-24p. organizational, direct support, and general support maintenance repair parts and special tools list for antenna group an/gra-4 (nsn 5985-00-244-5147) june 1978 see also. gra - ground radio accessory.
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.
TM 11-2651 Antenna Groups AN/GRA-4 and AN/GRA-12. 1961-04-19 Chapter 1. INTRODUCTION Section I. General. Scope 1 3 Forms and records 2 3 IL Description and data. Purpose and use 3 6 Technical characteristics 4 6 Components 5 6 Common name and nomenclature 6 10 Description of Antenna Mast Assembly AB-86/GRA-4 7 11 Description of Antenna AS-244/GRA-4 8 12 Description of Accessory Kit MX-1137/GRA ...
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.
TECHNICAL MANUAL. ORGANIZATIONAL, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE REPAIR PARTS AND SPECIAL TOOLS USTS. FOR. ANTENNA GROUP AN/GRA-4. (NSN 5985-00-244-5147)
11 wrz 2014 · DESCRIPTION AND DATA 3. Page 31 and 32: Reel Assembly RL122/GRA-4 3 2 4.25 ; Page 33 and 34: %o Figure 4. Antenna AS-244/GRA-4, Page 35 and 36: 7. Description of Antenna Mast Asse; Page 37 and 38: g. The lead-in wire is a 10-foot se; Page 39 and 40: CHAPTER 2 INSTALLATION 12. Selectin; Page 41 and 42: (4) Center-fed Hertz antenna. (a)
