TM 1 1 - 5 8 2 0 - 9 2 1 - 4 0 - 1
AS A SEPARATE COMPONENT
1-36. Subsequent paragraphs l-37 through l-42 describe the installation procedures for the power
amplifier as a separate component.
1-37. INSTALLATION CONSIDERATIONS
1-38. The following considerations should be made when determining the proper location of the power
a. Best operating conditions.
b. Ease of maintenance, adjustment of equipment and replacement and repair of defective parts or
c. The possible interaction between the power amplifier and other electronic equipment in the
Availability of adequate power.
Availability of adequate grounding.
1-39. POWER AMPLIFIER MOUNTING INSTRUCTIONS
1-40. The following instructions describe how, to mount the power amplifier using power amplifier
Mount MT-4497/GRC- 193 (RF Part No. 755017A9015). Refer to figures 1-6 and 1-7 for dimensional
1. The exact method of mounting the power amplifier depends on the type of installation. Make sure
that the surface selected allows adequate room for power amplifier ventilation intakes and outlets and
proper clearance for cable interconnection.
2. Refer to figure 1-7 and mark off the four mounting hole centers on the mounting surface.
3. Secure the power amplifier mount to the mounting surface using appropriate hardware. The hard-
ware selected should be of the appropriate type for the 0.375 inch (0.95 cm) mounting holes. Since the
power amplifier weighs approximately 54 pounds (24.5 kg), the screws, washers and lock washers used
should be of the appropriate type to secure the lower mounting tray to the mounting surface.
1-42. Variations among installations will determine the lengths of the cables connecting the power
amplifier to the system antenna coupler, the input power source, and the receiver-transmitter. Refer to
table 1-3 for the identification and types
of cables and cable connectors required for use with the power
amplifier. Table 1-4 identifies the pins on the power amplifier interface cables for cable fabrication
1-43. PREOPERATIONAL SERVICING
1-44. No preoperational servicing procedures apply other than removal of the plastic connector caps prior
to assembling cables to the power amplifier connectors. Retain plastic caps for future relocation and