Product Details | DIFFERENTIAL TRANSMITTER SYNCHRO

5990-00-677-6498 A synchro, the rotor of which is mechanically positioned for modifying electrical angular information, received from a transmitter synchro and transmitting to receiver synchro or control transformer synchro electrical information corresponding to the sum or difference of the electrical input angle and its rotor position angle. Does not include variable resistors, goniometers, variable transformers, or items with dials.

Part Alternates: MILS2070855, MIL-S-20708-55, 23TDX6B, 5990-00-677-6498, 00-677-6498, 5990006776498, 006776498

Electrical and Electronic Equipment Components | Synchros and Resolvers

Supply Group (FSG) NSN Assign. NIIN
59 01 JAN 1963 00-677-6498

Drawings & Photos | NSN 5990-00-677-6498


Cross Reference | NSN 5990-00-677-6498

Part Number Cage Code Manufacturer
23TDX6B 81349 MILITARY SPECIFICATIONS PROMULGATED BY MILITARY
MIL-S-20708-55 81349 MILITARY SPECIFICATIONS PROMULGATED BY MILITARY

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Technical Data | NSN 5990-00-677-6498

Characteristic Specifications
BODY SIZE 23
STATOR INPUT VOLTAGE RATING IN VOLTS 90.0 NOMINAL
STATOR INPUT CURRENT RATING 215.0 MILLIAMPERES NOMINAL
STATOR INPUT ELECTRICAL POWER RATING 4.8 WATTS NOMINAL
FREQUENCY IN HERTZ 60.0 NOMINAL
ZSO IMPEDANCE MAGNITUDE IN OHMS 370.00 MINIMUM AND 470.00 MAXIMUM
ZSO IMPEDANCE ANGLE IN DEG 74.00 MINIMUM AND 78.00 MAXIMUM
ZRS IMPEDANCE MAGNITUDE IN OHMS 175.00 MINIMUM AND 220.00 MAXIMUM
ZRS IMPEDANCE ANGLE IN DEG 15.00 MINIMUM AND 20.00 MAXIMUM
TRANSFORMATION RATIO 1.154 ROTOR TO STATOR NOMINAL
PHASE SHIFT ANGLE IN DEG 11.500 INPUT TO OUTPUT MAXIMUM
MAXIMUM TEMP RISE 25.0 DEG CELSIUS
ELECTRICAL ERROR ANGULAR RANGE IN MINUTES -6.0 TO 6.0
TORQUE GRADIENT PER ANGULAR DEG 0.030 INCH-OUNCES NOMINAL
BODY STYLE A4 STANDARD ROUND D
SHOULDER DIAMETER 1.9850 INCHES MINIMUM AND 1.9900 INCHES MAXIMUM
PILOT DIAMETER 0.5970 INCHES NOMINAL
SECOND SHOULDER DIAMETER 1.9990 INCHES MINIMUM AND 1.9995 INCHES MAXIMUM
SECOND SHOULDER LENGTH 0.1700 INCHES NOMINAL
OVERALL LENGTH 4.5490 INCHES NOMINAL
FLANGE DIAMETER 2.2490 INCHES MINIMUM AND 2.2500 INCHES MAXIMUM
FLANGE THICKNESS 0.2500 INCHES NOMINAL
BODY DIAMETER 1.9900 INCHES NOMINAL
PILOT LENGTH 0.0430 INCHES NOMINAL
SHOULDER LENGTH 0.2500 INCHES NOMINAL
AFT OF FIRST FLANGE DIAMETER 1.9990 INCHES MINIMUM AND 1.9995 INCHES MAXIMUM
MOUNTING SURFACE TO TERMINAL END DISTANCE 3.8300 INCHES NOMINAL
SHAFT TYPE SPLINE W/THREADS SINGLE SHAFT
SHAFT DIAMETER 0.2400 INCHES MINIMUM AND 0.2405 INCHES MAXIMUM SINGLE SHAFT
SHAFT LENGTH 0.7190 INCHES NOMINAL SINGLE SHAFT
SHAFT THREAD LENGTH 0.2900 INCHES NOMINAL SINGLE SHAFT
SPLINE TOOTH QUANTITY 22 SINGLE SHAFT
SPLINE TOOTH DIAMETRAL PITCH 96 SINGLE SHAFT
SHAFT THREAD SERIES DESIGNATOR UNF SINGLE SHAFT
SHAFT NOMINAL THREAD SIZE 0.250 INCHES SINGLE SHAFT
SHAFT THREAD CLASS 2A SINGLE SHAFT
SHAFT THREAD DIRECTION RIGHT-HAND SINGLE SHAFT
TERMINAL TYPE AND QUANTITY 6 SCREW
TERMINAL LOCATION REAR
BODY MATERIAL STEEL, CORROSION RESISTING
TEST DATA DOCUMENT 81349-MIL-S-20708 SPECIFICATION
SPECIFICATION/STANDARD DATA 81349-MIL-S-20708/55 GOVERNMENT SPECIFICATION
MANUFACTURERS CODE 81349
NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE MIL-S-20708-55
MANUFACTURERS CODE 81349

Restrictions/Controls & Freight Information | NSN 5990-00-677-6498

Category Code Description
Shelf-Life Code:0Nondeteriorative
Hazardous Material Indicator CodeNThere is no data in the HMIS and the NSN is in an FSC not generally suspected of containing hazardous materials
Demilitarization Code:ANon-Munitions List Item/ Non-Strategic List Item - Demilitarization not required.
Controlled Inventory Item Code:UUNCLASSIFIED
Precious Metals Indicator Code:UPrecious metal type is unknown
Criticality Code:X The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.
Category Code Description
NMF Description 062120 GENERATORS/MOTORS/PARTS NOI
Less than car load rating Q 70
Less than truck load rating W Rating Variable
Water commodity Code 590 unknown
Originating Activity Code XX
Air Dimension Code A Shipment is not a consolidation and does not exceed 72 inches in any dimension.
Air Commodity H Signal Corps supplies and equipment, including radio equipment and supplies, communications equipment and supplies, electrical equipment and supplies, etc.
Air Special Handling Z No special handling required.
Special Handling Code 9 unknonwn
HAZMAT
Type of Cargo Z No special type of cargo code applicable

Management | NSN 5990-00-677-6498

Category Code Description
Cognizance Codes9NNavy-owned stocks of defense electronic material
Naval Inventory Control Point, Mechanicsburg
Source of SupplyS9EDefense Supply Center Columbus
Columbus, OH 43218
AgencyDNDepartment of the Navy
Service OrganizationNU.S. Navy
Acquisition Advice CodesYTERMINAL ITEM #(NON-STOCKED ITEMS) Future procurement is not authorized. No wholesale stock is available for issue. 1. Requisitions will not be processed to the wholesale manager. 2. Internal Service/agency requisitioning may be continued in accordance with the Service/agency requisitioning policies.
Controlled Item CodeUUNCLASSIFIED
Shelf Life Code0Nondeteriorative
Purchasing QTY
UOM
1
EA : Each