The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-569-0183, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Electronic Transformer Corp Div Electronic Transformer Corporation. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5950-00-569-0183 |
| Primary Part Number | C2539 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Electronic Transformer Corp Div Electronic Transformer Corporation |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Mounting Method | THREADED STUD(S) SINGLE GROUP |
| Body Width | 1.406 INCHES NOMINAL IN |
| Body Height | 2.938 INCHES NOMINAL IN |
| Maximum Transformer Power Rating | 20.0 DECIBELS SINGLE COMPONENT |
| Winding Function and Quantity | 2 PRIMARY AND 2 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 600.0 NOMINAL SINGLE COMPONENT ALL PRIMARY |
| Impedance Rating in Ohms | 135.0 NOMINAL SINGLE COMPONENT ALL SECONDARY |
| Distance Between Mounting Facility Centers | 0.625 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Nominal Thread Size | 0.164 INCHES SINGLE GROUP IN |
| Body Length | 1.891 INCHES NOMINAL IN |
| Winding Operating Current | 5.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT ALL PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 100.0 HERTZ MINIMUM AND 150.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Thread Quantity Per Inch | 32 SINGLE GROUP |
| Terminal Type and Quantity | 8 WIRE HOOK |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP |
| 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 |
|---|---|
| C2539 | Electronic Transformer Corp Div Electronic Transformer Corporation (USA) |
| A9611 | Autodyne Manufacturing Co Inc (USA) |
| 39399 | Freed Transformer Co (USA) |
| Reference | Meaning |
|---|---|
| SCC67303 | 3/2 Design control — primary reference U.S. Government activity |
| GA51071 | 5/9 Secondary reference American Telephone and Telegraph Co |
| GA51071 | 5/9 Secondary reference At and T Corp |
| GA51071 | 5/9 Secondary reference U.S. Government activity |
| SCC67303 | 5/9 Secondary reference U.S. Government activity |
| MC50567 | 5/9 Secondary reference Nytronics Inc |
NSN 5950-00-569-0183 is a Transformer,audio Frequency, manufactured by Electronic Transformer Corp Div Electronic Transformer Corporation, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-569-0183 has 3 manufacturer part numbers on file: C2539 (Electronic Transformer Corp Div Electronic Transformer Corporation), A9611 (Autodyne Manufacturing Co Inc), 39399 (Freed Transformer Co).
1 possible match (shared part number, not a government interchangeability claim): 1650-01-115-4331. Verify interchangeability with system specifications before substitution.
Key specifications for C2539: Overall Height: 3.312 INCHES NOMINAL IN; Mounting Facility Quantity: 2 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Mounting Method: THREADED STUD(S) SINGLE GROUP. 18 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.