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2R661 — TRANSFORMER,RADIO FREQUENCY

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

2R661: TRANSFORMER,RADIO FREQUENCY.

The TRANSFORMER,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include body_width: 1.438 INCHES NOMINAL IN, body_height: 1.000 INCHES NOMINAL IN, body_length: 1.500 INCHES NOMINAL IN, rating_method: WINDING TURNS SINGLE COMPONENT ALL SECONDARY, turn_quantity: 6 SINGLE COMPONENT SECOND SECONDARY, coil_form_type: HOLLOW SINGLE COMPONENT. This part is cataloged in the U.S.

Government catalog under NSN 5950-00-229-8663, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
2R661
NSN: 5950-00-229-8663
FSC: 5950 — Coils and Transformers
CAGE: 20950 — ESPEY MFG AND ELECTRONICS CORP (USA)
SPECIFICATIONS
body_width1.438 INCHES NOMINAL IN
body_height1.000 INCHES NOMINAL IN
body_length1.500 INCHES NOMINAL IN
rating_methodWINDING TURNS SINGLE COMPONENT ALL SECONDARY
turn_quantity6 SINGLE COMPONENT SECOND SECONDARY
coil_form_typeHOLLOW SINGLE COMPONENT
inclosure_typeFULLY INCLOSED
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
frequency_rating320.0 KILOHERTZ MINIMUM AND 750.0 KILOHERTZ MAXIMUM SINGLE COMPONENT
reliability_indicatorNOT ESTABLISHED
mounting_hole_diameter0.128 INCHES NOMINAL SINGLE GROUP IN
winding_conductor_size0.00198 INCHES AMERICAN WIRE GAGE SINGLE COMPONENT SECOND SECONDARY IN
NSN5950-00-229-8663
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,RADIO FREQUENCY TITLE COMPONENT PN 2R661 MFR TRANSFORMER,RADIO FREQ
KEY FEATURES
•
MOUNTING FACILITY QUANTITY: 2 SINGLE GROUP
•
INCLOSURE TYPE: FULLY INCLOSED
•
TURN QUANTITY: 1050 SINGLE COMPONENT SINGLE PRIMARY
•
MOUNTING METHOD: UNTHREADED HOLE(S) SINGLE GROUP
•
ADJUSTMENT DEVICE DRIVE TYPE: SLOTTED SCREW SINGLE COMPONENT
•
BODY WIDTH: 1.438 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MOUNTING FACILITY QUANTITY2 SINGLE GROUP
INCLOSURE TYPEFULLY INCLOSED
TURN QUANTITY1050 SINGLE COMPONENT SINGLE PRIMARY
TURN QUANTITY258 SINGLE COMPONENT FIRST SECONDARY
TURN QUANTITY6 SINGLE COMPONENT SECOND SECONDARY
MOUNTING METHODUNTHREADED HOLE(S) SINGLE GROUP
ADJUSTMENT DEVICE DRIVE TYPESLOTTED SCREW SINGLE COMPONENT
BODY WIDTH1.438 INCHES NOMINAL IN
BODY HEIGHT1.000 INCHES NOMINAL IN
ADJUSTMENT METHOD AND QUANTITY1 ADJUSTABLE CORE SINGLE COMPONENT
SUBSTITUTES & CROSS-REFERENCES 1
2-661Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2R661?
2R661 is a TRANSFORMER,RADIO FREQUENCY.
What parts can replace 2R661?
There is 1 known substitute for 2R661: 2-661. Substitute compatibility should be verified for your specific system.
What is the NSN for 2R661?
2R661 is cataloged in the U.S. Government catalog under NSN 5950-00-229-8663. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.