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Worldwide distributor of NSN parts and consumables located in the USA.

Receiver-transmitter Synchro

Model / MPN: 23TRX4A | NSN: 5990-00-904-3314
ITAR Registered seal

A synchro having a dual purpose. It may be used in applications requiring either a receiver or transmitter. For synchros having a single purpose, see synchro, receiver and synchro, transmitter.

Product Details
NATO Stock Number
5990-00-904-3314
Sold in multiples of
1 EA
DEMIL
DEMIL/MLI
Body Material
Steel, stainless
Body Style
Standard round d
Shoulder Diameter
Between 1.9850 inches and 1.9900 inches
Pilot Diameter
0.5950 inches
Second Shoulder Diameter
Between 1.9985 inches and 1.9995 inches
Second Shoulder Length
0.1700 inches
Overall Length
4.2990 inches
Flange Diameter
Between 2.2490 inches and 2.2500 inches
Flange Thickness
0.2500 inches
Body Diameter
1.9900 inches
Shaft Diameter
0.2403 inches single shaft and 0.2405 inches single shaft
Shaft Length
0.7190 inches single shaft
Fragility Factor
Moderately rugged
Maximum Tempurature Rise
30.0 degrees celsius
Body Size
23
Rotor Input Voltage Rating In Volts
115.0
Frequency In Hertz
400.0
Rotor Input Current Rating
720.0 milliamperes
Zss Impedance Magnitude In Ohms
Between 6.50 and 8.10
Zss Impedance Angle In Deg
Between 42.00 and 46.00
Phase Shift Angle In Deg
2.000 input to output
Maximum Fundamental Null Voltage In Millivolts Per Volt
30.00 output
Maximum Total Null Voltage Output In Millivolts Per Volt
150.00
Electrical Error Angular Range In Minutes
-6.0/+6.0
Spline Tooth Quantity
21 single shaft
Receiver Error Angular Range In Minutes
-45.0/+45.0
Torque Gradient Per Angular Deg
0.250 inch-ounces
Pilot Length
0.0430 inches
Shoulder Length
0.2500 inches
Aft Of First Flange Diameter
Between 1.9985 inches and 1.9995 inches
Mounting Surface To Terminal End Distance
3.5800 inches
Spline Tooth Diametral Pitch
96 single shaft
Shaft Thread Series Designator
Unf single shaft
Shaft Thread Direction
Right-hand single shaft
Shaft Thread Class
2a single shaft
Terminal Location
Rear
Shaft Thread Length
0.2900 inches single shaft
Shaft Type
Spline w/threads single shaft
Transformation Ratio
0.783 rotor to stator
Shaft Thread Size
0.250 inches single shaft
Test Data Document
81349-mil-s-20708 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Terminal Type And Quantity
5 screw
Specification Data
81349-mil-s-20708/50 government specification
Solicitations
Solicitation Description Qty UOM Close Date
SPE7M515T8352 Tr Synchro, Receiver 20 EA 06/18/2015
SPE7M118T8395 Tr Synchro, Receiver 13 EA 02/05/2018
SPE7M120T110T Tr Synchro, Receiver 14 EA 03/02/2020
SPE7M121T169P Tr Synchro, Receiver 3 EA 04/22/2021

Pricing and Availability

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23TRX4A Cross Reference
  • VTRX23/4N3
  • 23TRX4
  • M20708-50C-001
  • M20708/50D-001
  • M2078/50C-001
  • MILS20708-44
  • MILS20708-50BM20708-
  • AS20708/50
  • VSSC2236P12
  • M20708/50-01A
  • 23TRX4A
  • MIL-S-20708/50
  • M20708-50-001
  • M20708/50-01A
  • 23M4F2Q