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AT-197A/GR Antenna, NSN 5985-00-784-0432

  • Image 1
NSN 5985007840432
8.00 LBS
Available for Purchase
Calculated at checkout

Product Description


The RAMI254 is a direct replacement for the OE-254/GRC Antenna Group. It is comprised of fewer piece parts,
allowing for quicker assembly and erection, along with being capable of both VHF (30-88 MHz) and UHF (225-
450 MHz) operation modes. It can be deployed atop its 27 ft. mast or utilized on the ground standing on its tripod
base. It is manufactured to meet the mechanical and environmental specifications as called out in MIL-PRF-49204
(OE-254/GRC specification). The antenna comes complete with 70 ft. RG-213 transmission line (antenna to
diplexer) and two 5 ft. RG-213 transmission lines (diplexer to radio set). Additional components for full assembly
and erection (mast or ground deployed) are included in the transit bag.


The AT-197A/GR Antenna is designed for broad-band omni-directional ground-based communications with aircraft. It is extended for used with Radio Sets AN/GRC-27, AN/GRC-29, and AN/TRC-32 which communicate with UHF command radio sets in aircraft and such ground UHF stations in the terminal area. The antenna is produced and qualified to Military Specification MIL-A-4946. The antenna mounting is made very versatile via a cast aluminum bracket which is furnished with the antenna.

Product Specifications
Application:  Ground-Air Communications
Frequency: 225 to 400 MHz
Impedance:  50 Ohms Nominal
VSWR:  1.6 to 1 Maximum
Polarization:  Vertical
Pattern:  Omni-Directional
Connector:  "HN" Female
Max Weight:  8 lb
RF Power Capacity: 1000 Watts Continuous
Gain: -0.3 dB over 225-400 MHz

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