Volume 1
MIL-HDBK-162A
Section 3
15 December 1965
ITEM NAME: ELECTRONIC CONTROL AMPLIFIER
TYPE: AM-420/U, AM-421/U
AM-420/U: 1 or 2-speed and/or 36-speed
the unit and permit insertion of such additional
synchro, coarse-speed synchro genera-
intelligence as compass readings or the like. They
tor.
incorporate a bearing dial which is also driven by the
AM-421/U: 1 or 2-speed and/or 36-speed
servo motor.
synchro, coarse and fine-speed synchro
generator.
RELATION TO SIMILAR EQUIPMENT
Accuracy
Dynamic: plus or minus 5 minutes.
The AM-420/U and AM-421/U are basically similar. The
Static: plus or minus 3 minutes.
Power Requirements: 115v, 60 cps plus or
while the AM-421/U has both coarse and fine speed
minus 10%, 23w reference, 123w supply.
synchro generators.
Heat Dissipation
AM-420/U: 156w
TECHNICAL DESCRIPTION
AM-421/U: 168w
Input: 1 or 2-speed and/or 36-speed
INSTALLATION CONSIDERATIONS
synchro.
Output
Not available.
PRINCIPAL COMPONENTS AND PHYSICAL DATA
SHIPPING DATA
COMPONENT
BOXES
OVERALL DIMENSIONS
UNIT WT.
(NR)
(Inches)
(Pounds)
Electronic Control Ampli-
1
21-1/4 x 30-1/4 x 37-3/4
264
fier AM/420/U
Electronic Control Ampli-
1
21-1/4 x 30-1/4 x 37-3/4
273
fier AM-421/U
Set of Equipment Spares
1
8-3/8 x 12-1/2 x 14-1/2
30
EQUIPMENT SUPPLIED DATA
COMPONENT
QTY
OVERALL DIMENSIONS
UNIT WT.
(Inches)
(Pounds)
AM-420/U
Electronic Control Ampli-
1
14-1/4 x 21-1/8 x 26
128
fier AM-420/U
Set of Equipment Spares
1
6 x 9 x 12
11
Technical Manual NAVSHIPS
2
3/8 x B-3/4 x 11-1/2
91517
AM-421/U
Electronic Control Ampli-
1
14-1/2 x 21-1/8 x 26
140
fier AM-421/U
Set of Equipment Spares
1
6 x 9 x 12
11
Technical Manual NAVSHIPS
2
3/8 x 8-3/4 x 11-1/2
91518
REFERENCE DATA AND LITERATURE
Technical Manuals:
NAVSHIPS 91519 for Electronic Control
Amplifier AM-420/U.
NAVSHIPS 91518 for Electronic Control
Amplifier AM-421/U.
AM-420/U: 2
Previous Page
