Model: M20708/74-01A

Receiver-transmitter Synchro

Properties:

Body Material
Steel, stainless
Body Style
Standard round double flange a
Shoulder Diameter
Between 3.3290 inches and 3.3340 inches
Pilot Diameter
1.6250 inches
Second Shoulder Diameter
Between 3.3740 inches and 3.3750 inches
Second Shoulder Length
0.3750 inches
Overall Length
5.9500 inches
Flange Diameter
Between 3.6240 inches and 3.6250 inches
Flange Thickness
0.2500 inches
Body Diameter
Between 3.3850 inches and 3.3900 inches
Shaft Diameter
0.2403 inches single shaft and 0.2405 inches single shaft
Shaft Length
0.7000 inches single shaft
Fragility Factor
Moderately rugged
Distance Between Flanges
1.8120 inches
Maximum Tempurature Rise
35.0 degrees celsius
Body Size
37
Rotor Input Voltage Rating In Volts
115.0
Frequency In Hertz
60.0
Rotor Input Current Rating
830.0 milliamperes
Rotor Input Electrical Power Rating
9.25 watts
Zss Impedance Magnitude In Ohms
Between 7.00 and 10.00
Zss Impedance Angle In Deg
Between 30.00 and 40.00
Phase Shift Angle In Deg
3.000 input to output
Maximum Fundamental Null Voltage In Millivolts Per Volt
35.00 output
Maximum Total Null Voltage Output In Millivolts Per Volt
170.00
Electrical Error Angular Range In Minutes
-10.0/+10.0
Spline Tooth Quantity
22 single shaft
Receiver Error Angular Range In Minutes
-36.0/+36.0
Torque Gradient Per Angular Deg
0.900 inch-ounces
Pilot Length
0.1600 inches
Shoulder Length
0.6550 inches
Mounting Surface To Terminal End Distance
5.0600 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
0.3100 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-20708/74 government specification
NSN
5990-00-852-2369
Part Number
M20708/74-01A
Description
Synchro,receiver-transmitter
CAGE
81343

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.

Part M20708/74-01A NSN 5990-00-852-2369

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
27218
FIIG:
A07800
Concept No.:
1
App. Key:
F
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
EH
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
8.0000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
062120
UFC:
34760
LTL:
RATING VARIABLE
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

End Items End applications NSN 5990-00-852-2369 is a component of

  • Series An/sps-49(v) Radar
  • Mk 92 (fcs) Fire Control System
  • Non-trident Exterior Communication
  • An/uya-4(v) Tactical Data System
  • 115 Ft Utility Landing Craft
  • Wind Measuring And Indicating System Wmis
  • Los Angeles Class Ssn (688)
  • Sturgeon Class Ssn (637)
  • Ticonderoga Class Cg (47)

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Schedule B and Export
  • Schedule B: 9014900000
  • SITC: 87412
  • End Use: Marine engines, parts
  • NAICS: 334511
  • USDA: 1

Freight Class: Parts & accessories for direction finding compasses and other navigational instruments and appliances

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