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Section III. PRINCIPLES OF OPERATION - TM-11-5820-554-120060
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TM-11-5820-554-12 Radio Set AN/FRC-93(V)1 AN/FRC-93(V)2 AN/FRC-93(V)3. AN/FRC-93(V)4 AN/FRC-93(V)5 AN/FRC-93(V)6 AN/FRC-93(V)7 Manual
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CHAPTER 9. REGULATOR, VOLTAGE CN-1214/g


TM 1 1-5820-554-12
developed is connected to one input of the difference
the ujt firing circuit. Filtered, regulated d.c. voltage is
amplifier to supply a stable bias point.
supplied to the difference amplifier and reference
circuit.
8-13. Feedback Circuit
8-15. Harmonic Filter Network
The feedback circuit supplies a d.c. signal voltage,
proportional to the output voltage, to the difference
The harmonic distortion in the solatron autotransformer
amplifier. The voltage level of the feedback signal is
network output is reduced to less than 12 percent by the
adjusted by the potentiometer. This potentiometer is
harmonic filter network. Its output is applied to the
factory-adjusted to give nominal voltage, and should
load and to the output voltage feedback circuit.
not require further adjustment.
8-14. D.C. Supply for Control Circuits
Unfiltered, regulated d.c. voltage is supplied to
Section IV. OPERATOR'S MAINTENANCE INSTRUCTIONS
8-16. General
Paragraphs 3-19 through 3-22 cover operator's maintenance duties. Paragraph 3-24 covers cleaning.
8-17. Operator's Preventive Maintenance Checks and Service Chart for
Regulator, Voltage, CN-1146/FRC-93
Item
Interval
Equipment is not ready/
No.
available if:
Item to be inspected
Procedures
B
D
A
W
M
Regulator loading
Apply known load to output
Regulator fails to maintain steady
of regulator and check for
load voltage
voltage change.
.
Section V. ORGANIZATIONAL MAINTENANCE INSTRUCTIONS
8-18. General
Organizational maintenance instructions are covered in paragraphs 3-25, 3-26, and 3-27. Touchup painting is
covered in paragraph 3-29.
8-19. Organizational Preventive Maintenance Checks and Services Chart for Regulator,
Voltage CN-1146/FRC-93
W-Weekly
M-Monthly
Q-Quarterly
Item
Interval
No.
Item to be inspected
Procedures
W
M
Q
1
Regulator stability
Apply known load to regulator and check output voltage
stability
2
Change generator output frequency
Output voltage will remain stable with input power frequency
slightly by reducing engine rpm.
change.
Change 6 8-6


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