The Attenuator,variable, cataloged under National Stock Number 5985-01-461-1538, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Telonic Berkeley, Inc. Dba Telonic Berkeley. Government technical data includes 26 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-461-1538 |
| Primary Part Number | 8120S |
| Item Name | Attenuator,variable |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Telonic Berkeley, Inc. Dba Telonic Berkeley |
| Status | ACTIVE |
| Shaft Type | ROUND |
| Insertion Loss at Minimum Attenuation in Maximum Decibels | 0.2 |
| Impedance Rating in Ohms | 50.0 INPUT-OUTPUT |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| Frequency Range | 0.000 GIGAHERTZ MINIMUM AND 2.000 GIGAHERTZ MAXIMUM |
| Shaft Diameter | 0.250 INCHES NOMINAL IN |
| Body Style | COAXIAL TYPE |
| Mounting Facility Pattern | FOUR POSITION DIAMOND |
| Segment Attenuation Accuracy in Decibels | -0.30 TO 0.30 AND -0.50 TO 0.50 AND -0.70 TO 0.70 AND -0.80 TO 0.80 AND -1.00 TO 1.00 AND -1.20 TO 1.20 AND -1.30 TO 1.30 AND -1.40 TO 1.40 AND -1.50 TO 1.50 AND -1.60 TO 1.60 |
| Adjustment Device Type and Quantity | 1 SHAFT AND 1 KNOB W/DIAL |
| Overall Attenuation Range in Decibels | +0.0 TO 100.0 |
| Voltage Standing Wave Ratio | 1.30 |
| Segment Attenuation Range in Decibels | +0.00 TO 10.00 AND +10.00 TO 20.00 AND +20.00 TO 30.00 AND +30.00 TO 40.00 AND +40.00 TO 50.00 AND +50.00 TO 60.00 AND +60.00 TO 70.00 AND +70.00 TO 80.00 AND +80.00 TO 90.00 AND +90.00 TO 100.00 |
| Mounting Facility Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Overall Attenuation Accuracy in Decibels | -1.60 TO 1.60 |
| Attenuation Per Step in Decibels | 10.0 |
| Attenuation Variation Method | STEPPED |
| Mounting Thread Quantity | 32 PER INCH |
| Shaft Length | 0.620 INCHES NOMINAL IN |
| Mounting Facility Nominal Screw Thread Diameter | 0.138 INCHES IN |
| Operating Temp Range | -55.0 TO 85.0 CELSIUS DEGC |
| Application Design | TRANSMISSION LINE |
| Terminal Type and Quantity | 2 CONNECTOR, COAXIAL, MALE |
| Power Rating | 3.0 WATTS AVERAGE AND 1000.0 WATTS PEAK |
| Step Position Quantity | 10 |
| Coaxial Connector Series Designation | SMA |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 8120S PRIMARY | Telonic Berkeley, Inc. Dba Telonic Berkeley (USA) |
NSN 5985-01-461-1538 is a Attenuator,variable, manufactured by Telonic Berkeley, Inc. Dba Telonic Berkeley, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-461-1538 has 1 manufacturer part number on file: 8120S (Telonic Berkeley, Inc. Dba Telonic Berkeley).
Key specifications for 8120S: Shaft Type: ROUND; Insertion Loss at Minimum Attenuation in Maximum Decibels: 0.2; Impedance Rating in Ohms: 50.0 INPUT-OUTPUT; Mounting Facility Type and Quantity: 4 THREADED HOLE(S). 26 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.
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.