Model: MIL-S-20708/78

Transmitter Synchro

Properties:

Body Material
Aluminum
Body Style
Standard round a
Pilot Diameter
0.5000 inches
Overall Length
1.7900 inches
Flange Diameter
0.7500 inches
Flange Thickness
0.0620 inches
Undercut Diameter
0.6870 inches
Undercut Width
0.0620 inches
Shaft Diameter
0.0900 inches single shaft
Shaft Length
0.5000 inches single shaft
Fragility Factor
Moderately rugged
Maximum Tempurature Rise
8.5 degrees celsius
Body Size
8
Rotor Input Voltage Rating In Volts
26.0
Frequency In Hertz
400.0
Rotor Input Current Rating
153.0 milliamperes
Rotor Input Electrical Power Rating
70.0 milliwatts
Zro Impedance Magnitude In Ohms
Between 170.00 and 215.00
Zro Impedance Angle In Deg
Between 77.50 and 80.50
Zss Impedance Magnitude In Ohms
Between 11.00 and 15.00
Zss Impedance Angle In Deg
Between 9.00 and 15.00
Phase Shift Angle In Deg
8.500 input to output
Maximum Fundamental Null Voltage In Millivolts Per Volt
20.00 output
Maximum Total Null Voltage Output In Millivolts Per Volt
30.00
Electrical Error Angular Range In Minutes
-7.0/+7.0
Actuator Friction Torque At Minus 55 Deg Celsius
0.04 inch-ounces
Pilot Length
0.0400 inches
Mounting Surface To Terminal End Distance
1.2400 inches
Terminal Location
Rear
Shaft Slot Depth
0.0250 inches single shaft
Shaft Slot Width
0.0200 inches single shaft
Shaft Type
Round, slotted single shaft
Transformation Ratio
0.454 rotor to stator
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 wire lead
Specification Data
81349-mil-s-20708/78 government specification
NSN
5990-01-013-4569
Part Number
MIL-S-20708/78
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-20708/78 NSN 5990-01-013-4569

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:
--
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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