The Attenuator,variable, cataloged under National Stock Number 5985-00-239-6126, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-239-6126 |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Status | ACTIVE |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.2 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 2 CONNECTOR |
| Frequency Range | 0.000 MEGAHERTZ MINIMUM AND 900.000 MEGAHERTZ MAXIMUM |
| Body Style | CYLINDRICAL W/ADJUSTMENT KNOB |
| Adjustment Device Type and Quantity | 1 KNOB |
| Overall Diameter | 3.000 INCHES NOMINAL IN |
| Overall Attenuation Range in Decibels | +0.0 TO 1.0 |
| Voltage Standing Wave Ratio | 1.30 |
| Overall Attenuation Accuracy in Decibels | -0.01 TO 0.01 |
| Scale Linearity | LINEAR |
| Attenuation Per Step in Decibels | 0.1 |
| Attenuation Variation Method | STEPPED |
| Schematic Diagram Designator | UNBALANCED "PI" |
| Scale Division Quantity | 11 |
| Application Design | AUDIO |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, MALE |
| Power Rating | 2.0 WATTS AVERAGE |
| Step Position Quantity | 11 |
| Coaxial Connector Series Designation | BNC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 192-405 | 5/9 Secondary reference U.S. Government activity |
| CN-1292/U | 3/2 Design control — primary reference U.S. Government activity |
| TC-50A | 5/9 Secondary reference Telonic Berkeley, Inc. Dba Telonic Berkeley |
| 203-192405-000 | 5/2 Secondary reference U.S. Government activity |
NSN 5985-00-239-6126 is a Attenuator,variable, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-00-285-5289. Verify interchangeability with system specifications before substitution.
Key specifications for 5985-00-239-6126: Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.2; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 2 CONNECTOR; Frequency Range: 0.000 MEGAHERTZ MINIMUM AND 900.000 MEGAHERTZ MAXIMUM. 20 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5985-00-239-6126 has DEMIL Code B. 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.