Description
Raytheon OMS-402 Control, Test Programmer, Ordnance No. 9195781
Item Overview
This Raytheon OMS-402 Control, Test Programmer is a removable electrical test module made for use with a larger military maintenance console. Its controls and test points concern klystron and master-oscillator circuits used in radar equipment. Evidence from its markings and related Raytheon programmer modules strongly supports an application within the HAWK surface-to-air missile system, most likely for testing the High-Power Illuminator Radar, also known as the HPI or HIPIR. This is maintenance equipment rather than a component installed in an operating radar or missile.
Identification and Features
The identification plate names the assembly as a Control, Test, Programmer and marks it OMS-402. Ordnance number 9195781 identifies the complete module, while serial number A9066 identifies this individual unit. The blue rear contact board is marked AMP 595396-1 and ORDNANCE NO. 9322493 REV B. The front panel includes connections marked KLY FIL, KLY REP, and KLY ANODE, along with voltage terminals and a CONTINUITY indicator. Two handles permit the module to be inserted into and removed from its associated test console.
- Manufacturer: Raytheon
- Program designation: OMS-402
- Official nomenclature: Control, Test, Programmer
- Complete-unit ordnance number: 9195781
- Serial number: A9066
- Contact-board part number: AMP 595396-1
- Contact-board ordnance number: 9322493
- Contact-board revision: Rev B
- Marked test circuits: KLY FIL, KLY REP, and KLY ANODE
- Probable system: HAWK HPI/HIPIR radar maintenance equipment
Historical Background
HAWK maintenance equipment was developed around replaceable electronic assemblies and specialized test stations. Plug-in programmer modules allowed a common test console to be configured for particular circuits without rebuilding the console for every task. The OMS-402 belongs to this form of Cold War military test equipment. Its Raytheon manufacture, programmer-style construction, contact matrix, and radar-related circuit labels place it within the same general equipment family as HAWK test programmers.
Function and Operation
The module’s rear contact matrix established the electrical routes needed for a selected test program when the unit was inserted into its console. KLY FIL identifies the klystron filament circuit, KLY REP identifies the repeller circuit, and KLY ANODE identifies the anode circuit. These connections allowed technicians to reach key operating circuits of a klystron-based radar assembly. The voltage terminals and CONTINUITY indicator supported electrical measurements and continuity checks. The OMS-402 programmed and routed the tests; it was not itself a klystron, radar transmitter, power supply, or complete test station.
Probable End-Item Application
The strongest supported application is the HAWK High-Power Illuminator Radar, commonly identified as the HPI or HIPIR. Army HAWK documentation identifies master-oscillator circuitry and klystron equipment within this radar family, matching the circuits named on the OMS-402 panel. The evidence supports identifying the module as HAWK radar maintenance equipment used for klystron and master-oscillator testing. The exact expansion of the letters “OMS” has not been confirmed and should not be added to the official nomenclature.
HAWK HPI/HIPIR Radar Equipment
The HPI/HIPIR was the HAWK battery’s precision tracking and target-illumination radar. After a target was acquired, the radar tracked it and directed radio-frequency energy toward it. Reflected energy supported target tracking and guided the missile’s semi-active radar seeker during an engagement. The radar depended on stable microwave-generating and amplifying circuits, including master-oscillator and klystron equipment. The OMS-402’s marked test connections fit the maintenance needs of those circuits.
Related HAWK Test-Programmer Family
Known Raytheon programmers show that similar plug-in modules were made for different parts of the HAWK system. The shared blue AMP contact board indicates a common programmable-test-fixture format, but it does not mean the modules were interchangeable or served the same subsystem.
- OMS-402, Ordnance No. 9195781: probable HPI/HIPIR klystron and master-oscillator testing
HAWK Missile System Background
The U.S. Army developed HAWK during the 1950s as a mobile, all-weather air-defense missile system, and the first units entered service in 1960. A HAWK battery combined acquisition radars, command-and-control equipment, illuminator radars, launchers, and guided missiles. Raytheon served as the principal system contractor. Improved HAWK equipment began entering service during the 1970s, extending the system’s useful life and increasing the need for specialized electronic maintenance and test equipment.
History of Use
Maintenance personnel used programmer modules with larger shop test stations to check specific HAWK electronic circuits and locate faults. For an OMS-402 test program, technicians could connect the associated radar assembly through the programmed contact matrix and examine the klystron filament, repeller, anode, voltage, and continuity circuits. This supported the repair and return to service of important radar equipment without placing the programmer inside the operational radar during normal use.
Condition
This listing is for the OMS-402 plug-in module with its marked front panel, handles, electrical test connections, and blue AMP contact board as shown. The larger test console, connecting cables, radar assemblies, and other test-programmer modules are not included. The identification markings remain important parts of the assembly and include Ordnance No. 9195781, serial A9066, AMP 595396-1, and Ordnance No. 9322493 Rev B.
Ideal For
This specialized Raytheon module offers a documented example of the test equipment required to maintain a Cold War guided-missile radar system. Its marked klystron circuits, exposed contact matrix, and probable connection to the HAWK HPI/HIPIR make it well suited to technical, restoration, and historical displays.
- HAWK missile-system collections
- Cold War radar displays
- Military electronics exhibits
- Klystron and microwave-equipment study
- Raytheon equipment collections
- Air-defense restoration projects
Approx length 10", Approx width 8", Approx height 5", Approx weight 4.4lbs.
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