Model: MIL-S-20708/139

Transmitter Synchro

Properties:

Body Material
Aluminum alloy
Body Style
Standard round c
Shoulder Diameter
2.7000 inches
Pilot Diameter
0.2405 inches
Overall Length
4.1200 inches
Flange Diameter
3.1000 inches
Flange Thickness
0.2500 inches
Undercut Diameter
2.7500 inches
Undercut Width
0.0250 inches
Shaft Diameter
0.2405 inches single shaft
Shaft Length
0.7300 inches single shaft
Fragility Factor
Moderately rugged
Maximum Tempurature Rise
10.0 degrees celsius
Body Size
31
Rotor Input Voltage Rating In Volts
115.0
Frequency In Hertz
60.0
Rotor Input Current Rating
191.0 milliamperes
Rotor Input Electrical Power Rating
2.26 watts
Zro Resistance In Ohms
693.00
Zss Resistance In Ohms
63.00
Zro Impedance Angle In Deg
83.20
Zss Impedance Angle In Deg
20.00
Rotor Dc Resistance In Ohms
53.60
Stator Dc Resistance In Ohms
52.00
Phase Shift Angle In Deg
4.400 input to output
Maximum Fundamental Null Voltage In Millivolts Per Volt
30.00 output
Maximum Total Null Voltage Output In Millivolts Per Volt
100.00
Electrical Error Angular Range In Minutes
-8.0/+8.0
Spline Tooth Quantity
22 single shaft
Actuator Friction Torque At Minus 55 Deg Celsius
0.50 inch-ounces
Pilot Length
0.3750 inches
Shoulder Length
0.1850 inches
Mounting Surface To Terminal End Distance
3.3800 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
0.3130 inches single shaft
Shaft Type
Spline w/threads single shaft
Transformation Ratio
0.783 rotor to stator
Shaft Thread Size
0.390 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-20708/139 government specification
NSN
5990-01-030-5206
Part Number
MIL-S-20708/139
Description
Synchro,transmitter
CAGE
81349

A synchro consisting of a stator and rotor inductively coupled. The electrical output of the stator into a receiver synchro, a control transformer or differential synchro is dependent upon the position of its rotor. Does not include variable resistors, goniometers, variable transformers, or items with dials.

Part MIL-S-20708/139 NSN 5990-01-030-5206

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
02073
FIIG:
A07800
Concept No.:
1
App. Key:
H
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:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
4.4000lbs
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

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

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