The Modulator,radar, cataloged under National Stock Number 5840-01-090-1925, is classified within Federal Supply Class 5840 (Radar Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Columbo, Eugene. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5840-01-090-1925 |
| Primary Part Number | 654VE4820-2 |
| Item Name | Modulator,radar |
| FSC / FSG | 5840 / 58 — Radar Equipment, Except Airborne |
| Manufacturer | Columbo, Eugene |
| Status | ACTIVE |
| Circuit Construction Type | SOLID STATE |
| FSC Application Data | AN/MST-T1 |
| Inclosure Type | ENCASED |
| Frequency Per Channel | 1.0 GIGAHERTZ MINIMUM OPERATING CHANNEL AND 5.2 GIGAHERTZ MAXIMUM OPERATING CHANNEL |
| Connection Type | COAXIAL RECEPTACLE FRONT |
| Connection Type | COAXIAL RECEPTACLE LEFT SIDE |
| Connection Type | COAXIAL RECEPTACLE RIGHT SIDE |
| Operating Control Method | AUTOMATIC |
| Basic Shape Style | RECTANGULAR OR SQUARE |
| Installation Design | MECHANICAL |
| Polarity Per Channel | NEGATIVE OPERATING CHANNEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 654VE4820-2 | Columbo, Eugene (USA) |
| Reference | Meaning |
|---|---|
| SS-503N | 5/9 Secondary reference Hyletronics Limited Partnership |
| 654VE4820-2 | 7/2 Vendor item drawing reference U.S. Government activity |
| SS-503N | 3/9 Design control — primary reference Litton Systems Inc Hyletronics Group-Airtron Div |
NSN 5840-01-090-1925 is a Modulator,radar, manufactured by Columbo, Eugene, classified under FSC 5840, Radar Equipment, Except Airborne. Status: active.
NSN 5840-01-090-1925 has 1 manufacturer part number on file: 654VE4820-2 (Columbo, Eugene).
Key specifications for 654VE4820-2: Circuit Construction Type: SOLID STATE; Overall Height: 0.380 INCHES NOMINAL IN; FSC Application Data: AN/MST-T1; Inclosure Type: ENCASED. 11 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5840-01-090-1925 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.