NEWS | April 7, 2021

Test Sets: All About AN/GRM-122 Components

Using a radio test set
Photo by Staff Sgt. Ian Kummer
 
This article initially appeared in PS 797, pp. 48-50 (Apr 19).

Looking for the TM for the radio test set AN/GRM-122, NSN 6625-01-432-8369? Unfortunately, there’s no single published TM for the test set, but there is a component list that can help you account for Army property per regulations. 
      
Some good news is that there are TMs for the AN/GRM’s major component part, the TS-4317/GRM. They include:
 
  • TM 11-6625-3244-12 (Mar 06) 
  • TM 9-6625-3244-24P (Mar 06) 
  • TM 11-6625-3244-40 (Nov 06).
You can get all three from the Logistics Data Analysis Center (LDAC) Electronic Technical Manuals Online website. TM distribution is restricted, so you’ll need to log in with your CAC first at:
   
Choose the “ETM/IETM” icon and search for the TMs.
 
The following tables can help you sort things out when it comes to Army property accountability:
 
       AN/GRM-122 Component List
 
 
Table I
Components of Radio Test Set TS-4317/GRM,
NSN 6625-01-309-2825
Description NSN PN Cage Code Qty
Front cover 6625-01-611-5414 2503-7862-200 51190 1
Carrying pouch 8105-01-419-1132 1412-7883-700 51190 1
Connector, adapter, M-F BNC, right angle 5935-01-032-5404 UG-306/U 81349 1
Antenna, flex 5985-01-281-5177 1201-7616-500 51190 1
Cable assembly, AC power 6150-01-252-9297 6041-0001-001 51190 1
Cable assembly, DC power 5995-01-428-9119 6041-7884-500 51190 1
Attenuator, 10 dB, 1 W, BNC, 2.0 GHz 5985-01-414-6405 50F-010-BNC 61162 1
Attenuator, 20 dB 5985-01-414-6413 50F-020-BNC 61162 1
Fuse, 1.25, GL, slow, 250V, 2.0A 5920-00-228-7882 F02B250V2A 81349 1
Fuse, 1.25, GL, fast, 250V, 4.0A 5920-00-557-2647 F02A250V4A 81349 1
Fuse, 1.25, GL, slow, 32V, 15A 5920-00-581-6126 F02B32V15A 81349 1
Current shunt, 10A, 100mV 6625-01-414-3779 7113-7801-100 51190 1
Probe set, DMM 6625-01-414-3780
(1 black probe, 1 red probe)
21078 51190 1
Kit, probe, oscilloscope, X1/REF/X10 6625-01-414-3778 7112-0100-101 51190 1
Microphone 5965-01-414-6414 7001-8645-900 51190 1
   
Table II
Components of Test Adapter J-4843A/GRM,
NSN 6625-01-432-8368
Description NSN PN Cage Code Qty
Test set subassembly, J-4843A/GRM N/A 7003-1543-400 51190 1
Front cover 5340-01-502-2966 7005-1540-200 51190 1
Cable assembly, special purpose (SCSI) 5995-01-413-1849 6041-8380-600 51190 1
Cable assembly, special purpose (DC
power)
6150-01-413-0578 6041-8380-700 51190 1
Shield, elec. cable N/A 2289-7867-600 51190 1
Shield, elec. cable N/A 2289-7867-300 51190 1
Shield, elec. cable N/A 2289-7867-400 51190 1
                   
Table III
Components of Test Set Subassembly PL-1536/GRM,
NSN 6625-01-432-3819
Description NSN PN Cage Code Qty
Test set subassembly, PL-1536/GRM 6625-01-502-3407 7003-1542-500 51190 1
RF cable assembly (short BNC) 5995-01-413-0576 6052-0700-580 51190 5
Antenna matching network 6625-01-413-7331 7005-8340-700 51190 1
Adapter, connector (part of antenna
matching network)
5935-01-037-3476 M55339/16-00914
 
81349 1
RF cable assembly (long BNC) 5995-01-413-0580 6052-0701-060 51190 1
Cable assy, special purpose, elec. 5995-01-413-1853 6046-0782-400 51190 1
Nut, plain, hex N/A 517-4 19505 2
Washer, flat N/A 1414-1565-700 51190 1
Terminal, lug N/A 2850-1565-800 51190 1
Cover 5999-01-611-5289 1414-2954-000 51190 1
Cable assy, special purpose, elec. 5995-01-413-1852 6041-7885-200 51190 1
Cable assy, radio frequency 5995-01-413-0851 0021-83J0-100 51190 1
Maintenance kit, electronic equip. 6625-01-436-0420 7001-1542-400 51190 1
Test set subassembly N/A 0021-DKE0-100 51190 1
 
AN/GRM-122
File photo