Transmitter Synchro

MIL-S-20708/20C

(NSN) National Stock Number

5990-00-018-9723

Federal Supply Classification

5990 Synchros and Resolvers

Item Name Code

02073

Schedule B Code

9014900000

Summary

Standard round c body style, 1.3115 inches minimum and 1.3120 inches maximum shoulder diameter, 0.8745 inches minimum and 0.8750 inches maximum pilot diameter, 3.0630 inches nominal overall length, 1.4320 inches minimum and 1.4370 inches maximum flange diameter, 0.0930 inches nominal flange thickness

DAC	HCC	DMIL	RNCC
E	-	-	5

RNVC	SADC	MSDS	RNAAC
9	-	-	TX

Identification

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.

INC	FIIG	Concept	Condition
02073	A07800	1	1

Specifications

Body Style

standard round c

Details

The style designation indicating the configuration that most nearly corresponds to the appearance of the body.

Shoulder Diameter

1.3115 inches minimum and 1.3120 inches maximum

Details

The length of a straight line which passes through the center of a shoulder,and terminates at the circumference.

Pilot Diameter

0.8745 inches minimum and 0.8750 inches maximum

Details

The length of a straight line which passes through the center of that portion used to guide the item and terminates at the circumference.

Overall Length

3.0630 inches nominal

Details

The dimension measured along the longitudinal axis with terminated points at the extreme ends of the item.

Flange Diameter

1.4320 inches minimum and 1.4370 inches maximum

Details

The length of a straight line which passes through the center of a flange,and terminates at the circumference.

Flange Thickness

0.0930 inches nominal

Details

A measurement of the smallest dimension of a flange,in distinction from length or width.

Undercut Diameter

1.3120 inches nominal

Details

None.

Undercut Width

0.0780 inches nominal

Details

None.

Shaft Diameter

0.1870 inches minimum and 0.1872 inches maximum single shaft

Details

The length of a straight line which passes through the center of a shaft,and terminates at the circumference.

Shaft Length

0.5400 inches nominal single shaft

Details

A measurement of the longest dimension of the shaft,in distinction from width.

Fragility Factor

moderately rugged

Details

The measure of sensitivity of the item to be packaged. a factor used by packaging engineers in devising proper cushioning in a package.

Maximum Temp Rise

20.0 deg celsius

Details

The maximum permissible temperature increase in the item as a result of its operation under normal conditions.

Body Size

Details

An alpha and/or numeric designation indicating the size by which the body is identified.

Rotor Input Voltage Rating In Volts

115.0 nominal

Details

The value of the primary excitation voltage for which the rotor is rated,expressed in volts.

Frequency In Hertz

60.0 nominal

Details

The cycles per second /hertz/ of the alternating current.

Rotor Input Current Rating

22.0 milliamperes maximum

Details

The value of the primary excitation current for which the rotor is rated,with stator /secondary/ circuit open.

Rotor Input Electrical Power Rating

360.0 milliwatts nominal

Details

The value of the primary /electrical/ excitation power for which the rotor is rated.

Zro Impedance Magnitude In Ohms

5335.00 minimum and 6265.00 maximum

Details

The magnitude part /z/ of the rotor impedance with the stator open /zro/,expressed in ohms.

Zro Impedance Angle In Deg

80.00 minimum and 83.00 maximum

Details

The angle part /o/ of the rotor impedance with the stator open /zro/,expressed in degrees.

Zss Impedance Magnitude In Ohms

675.00 minimum and 825.00 maximum

Details

The magnitude part /z/ of the stator impedance with the rotor shorted /zss/,expressed in ohms.

Zss Impedance Angle In Deg

11.00 minimum and 16.00 maximum

Details

The angle part /o/ of the stator impedance with the rotor shorted /zss/,expressed in degrees.

Phase Shift Angle In Deg

7.000 input to output nominal

Details

The difference between the phase time of two or more voltages or currents of the same frequency,at the same instant of time,expressed in degrees.

Maximum Fundamental Null Voltage In Millivolts Per Volt

45.00 output

Details

The maximum voltage,without harmonics,induced in the secondary circuit at the null angle rotor position,expressed in millivolts per volt.

Maximum Total Null Voltage Output In Millivolts Per Volt

90.00

Details

The maximum voltage,including harmonics,induced in the secondary circuit at the null angle rotor position,expressed in millivolts per volt.

Electrical Error Angular Range In Minutes

-6.0 to 6.0

Details

The limits of permissible deviation in angular arc error from electrical zero,expressed in minutes.

Spline Tooth Quantity

21 single shaft

Details

The number of individual teeth on the splined portion of the shaft.

Torque Gradient Per Angular Deg

0.050 inch-ounces maximum

Details

The average torque per angular degree developed between two like items,when one rotor is turned /or displaced/ at 2 degree intervals,between a 10 degree counterclockwise position and 10 degree clockwise position.

Alignment Hole Quantity

Details

The number of holes provided for aligning the item.

Pilot Length

0.0400 inches nominal

Details

A measurement of the longest dimension of a pilot,in distinction from width.

Shoulder Length

0.1320 inches nominal

Details

None.

Mounting Surface To Terminal End Distance

2.5230 inches nominal

Details

None.

Spline Tooth Diametral Pitch

120 single shaft

Details

The number of teeth the splined shaft has per inch of pitch diameter.

Shaft Thread Series Designator

unf single shaft

Details

A designation distinguishing one group of shaft thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

Shaft Thread Direction

right-hand single shaft

Details

The direction of the shaft thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.

Shaft Thread Class

2a single shaft

Details

A numeric-alpha designator indicating the ptich diameter tolerance,and an external or internal shaft thread.

Body Material

steel corrosion resisting

Details

The chemical compound or mechanical mixture properties of which the body is fabricated.

Terminal Location

rear

Details

Indicates the location of the terminal/s/ on the item.

Shaft Thread Length

0.1850 inches nominal single shaft

Details

A measurement of the extent of the shaft threads measured on a line parallel to the longitudinal axis.

Shaft Type

spline w/threads single shaft

Details

Indicates the type of shaft included on the item.

Alignment Hole Depth

0.1250 inches minimum

Details

None.

Transformation Ratio

0.783 rotor to stator nominal

Details

The ratio of the output voltage to the input voltage at maximum coupling.

Alignment Hole Bolt Circle Diameter

1.1000 inches nominal

Details

None.

Shaft Nominal Thread Size

0.190 inches single shaft

Details

The length of a straight line passing through the center of the shaft threaded portion,with terminated points at the circumference.

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", "nominal", etc.).

Details

The specification,standard,drawing,or similar instrument that specifies environmental and performance requirements or test conditions under which an item is tested and establishes acceptable limits within which the item must conform identified by an alphabetic and/or numeric reference number. includes the commercial and government entity (cage) code of the entity controlling the instrument.

Terminal Type And Quantity

5 screw

Details

Indicates the type and number of terminals for providing electrical connection.

Specification/Standard Data

81349-mil-s-20708/20 government specification

Details

The document designator of the specification or standard which established the item of supply.

Master-Cross Reference List

Part	CAGE	DAC	HCC	RNCC	RNVC	MSDS	RNAAC
5990PL1359989	9009H	9	-	6	9	-	WP
300D717H02	90099	6	-	C	1	-	ZZ
15CS6B	03024	5	-	C	1	-	TX
VCX15-6D2	10112	5	-	C	1	-	TX
VCX15-6N2	10112	5	-	C	1	-	TX
2939198-1	53711	6	-	C	1	-	ZZ
181450	21877	5	-	C	1	-	ZZ
AS20708/20	0U583	5	-	5	1	-	ZZ
M20708/20-01C	0U583	5	-	3	2	-	ZZ
SAE-AS20708/20	0U583	E	-	3	1	-	ZZ
AS20708/20	0VH01	E	-	5	9	-	ZZ
AS20708/20	81343	E	-	5	9	-	ZZ
M20708/20-01C	81343	E	-	3	9	-	ZZ
15CX6C	99932	5	-	C	1	-	TX
1889768PC23	03956	6	-	C	1	-	ZZ
15CX6B	81349	4	-	C	1	-	ZZ
15CX6C	81349	E	-	C	1	-	TX
M20708/20-001	81349	E	-	5	9	-	TX
M20708/20-01C	81349	E	-	5	9	-	TX
M20708/20-02C	81349	6	-	C	1	-	ZZ
M20708/20C-001	81349	E	-	5	9	-	TX
MIL-S20708	81349	6	-	C	1	-	ZZ
MILS20708-20	81349	E	-	5	9	-	TX