PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1661Transformer,audio Frequency

Memovox Inc · NSN 5950-00-646-3603 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-646-3603 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-646-3603. Primary manufacturer part number: 1661.
Features
  • Transformer,audio Frequency — FSC 5950
  • Frequency Rating: 200.0 HERTZ MINIMUM AND 5.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
  • Terminal Type and Quantity: 6 TAB, SOLDER LUG
  • Inclosure Type: FULLY INCLOSED
  • Impedance Rating in Ohms: 50.0 NOMINAL SINGLE COMPONENT FIRST PRIMARY
  • Body Height: 2.000 INCHES NOMINAL IN
  • Winding Operating Current: 120.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT ALL PRIMARY
  • Mounting Method: TERMINAL SINGLE GROUP
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-646-3603, is classified within Federal Supply Class 5950 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Memovox Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-646-3603
Primary Part Number1661
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerMemovox Inc
StatusACTIVE
Frequency Rating200.0 HERTZ MINIMUM AND 5.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
Terminal Type and Quantity6 TAB, SOLDER LUG
Inclosure TypeFULLY INCLOSED
Impedance Rating in Ohms50.0 NOMINAL SINGLE COMPONENT FIRST PRIMARY
Body Height2.000 INCHES NOMINAL IN
Winding Operating Current120.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT ALL PRIMARY
Mounting MethodTERMINAL SINGLE GROUP
Impedance Rating in Ohms12800.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Body Length1.125 INCHES NOMINAL IN
Body Width1.125 INCHES NOMINAL IN
Winding Function and Quantity2 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
Primary to Secondary Turn Ratio16 TO 1 SINGLE COMPONENT
Impedance Rating in Ohms500.0 NOMINAL SINGLE COMPONENT SECOND PRIMARY
Transformer FunctionINPUT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6240-00-155-7958 INTERCHANGEABLE
Lamp,incandescent
5996-00-267-1139 INTERCHANGEABLE
Amplifier,radio Frequency
5325-00-301-865616750481-007 INTERCHANGEABLE
Grommet,nonmetallic
Sypris Electronics, Llc Div Sypris Electronics, Llc - Colorado Field Services
3460-00-322-5950B74.2 TY2 C60H12V 6X1-1/8X1-1/4 INTERCHANGEABLE
Wheel,abrasive
American National Standards Institute Incorporated Dba American National Standards Institute
2520-00-563-82311661 INTERCHANGEABLE
Sleeve
Atwood Industries Inc Automotive Div
5930-00-615-81951661 INTERCHANGEABLE
Switch
Illinois Tool Works, Inc. Div Magnaflux
2520-00-962-2966CA1647 INTERCHANGEABLE
Pressure Plate Assembly,clutch
Perfection Clutch
5855-01-072-88841661 INTERCHANGEABLE
Insert Lens Rotatin
Grimes Aerospace Company
5950-01-096-43331661 INTERCHANGEABLE
Coil
Crown Audio, Inc. Dba Crown International
6520-01-120-26531-661 INTERCHANGEABLE
Impression Tray,dental
Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia
Cross-Reference Index
Part NumberManufacturer
1661 Memovox Inc (USA)
67 Phaostron Instrument and Electronic Company (USA)
Related Parts
6240-00-155-7958INTERCHANGEABLE
LAMP,INCANDESCENT
5996-00-267-1139INTERCHANGEABLE
AMPLIFIER,RADIO FREQUENCY
5325-00-301-8656INTERCHANGEABLE
GROMMET,NONMETALLIC
16750481-007
3460-00-322-5950INTERCHANGEABLE
WHEEL,ABRASIVE
B74.2 TY2 C60H12V 6X1-1/8X1-1/4
2520-00-563-8231INTERCHANGEABLE
SLEEVE
1661
5930-00-615-8195INTERCHANGEABLE
SWITCH
1661
2520-00-962-2966INTERCHANGEABLE
PRESSURE PLATE ASSEMBLY,CLUTCH
CA1647
5855-01-072-8884INTERCHANGEABLE
INSERT LENS ROTATIN
1661
5950-01-096-4333INTERCHANGEABLE
COIL
1661
6520-01-120-2653INTERCHANGEABLE
IMPRESSION TRAY,DENTAL
1-661
4220-01-153-2123INTERCHANGEABLE
JACKET,BUOYANCY AID
1661
5340-01-360-9252INTERCHANGEABLE
HANDLE,BOW

Frequently Asked Questions

What is NSN 5950-00-646-3603?

NSN 5950-00-646-3603 is a Transformer,audio Frequency, manufactured by Memovox Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-646-3603?

NSN 5950-00-646-3603 has 2 cross-referenced part numbers: 1661 (Memovox Inc), 67 (Phaostron Instrument and Electronic Company).

What NSN replaces 5950-00-646-3603?

There are 12 known substitutes for 5950-00-646-3603: 6240-00-155-7958, 5996-00-267-1139, 5325-00-301-8656 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1661?

Key specifications for 1661: Frequency Rating: 200.0 HERTZ MINIMUM AND 5.0 KILOHERTZ MAXIMUM SINGLE COMPONENT; Terminal Type and Quantity: 6 TAB, SOLDER LUG; Inclosure Type: FULLY INCLOSED; Impedance Rating in Ohms: 50.0 NOMINAL SINGLE COMPONENT FIRST PRIMARY. 15 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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