Installation
Please look your amplifier and power supply over carefully. Observe the air inlet and outlet ventilation holes.
Facing the amplifier front panel, the cooling air inlets are on the top left and lower right side, including the right
bottom. The warm air outlet is on the lower left side of the cabinet as viewed from the normal operating
position (front view). While outlet air will not be particularly warm, it is never a good idea to have warm air
blow into heat sensitive equipment, such as transceivers or other power amplifiers. Have the same consideration
for your new amplifier and power supply. Be sure the air inlet temperature isn’t substantially above normal
room temperature. Ideally the air inlet should be kept below 32° C or 90° F, although temperatures up to 41° C
or 106° F are permissible. If ambient temperatures exceed these limits it might become necessary to reduce duty
cycle or power.
Warning:
Do not block cooling air inlets and outlets! Never expose the amplifier to water or
mist.
Airflow Clearances
The amplifier must have a clear area to the bottom, both sides, and top for proper airflow, and to the rear for
interconnection wiring. It is especially important to avoid obstructions that block the air inlet on the top left, as
well as both lower sides. Two inches clearance is normally adequate for full ventilation. Keep any papers or
loose objects that might impede airflow away from the air inlets and outlets.
Locate the amplifier and power supply away from sensitive equipment such as microphones, audio processing
equipment, or low level audio or radio frequency amplifiers. Generally, the best location for the power supply is
below the operating desk and away from antenna feed lines. This will keep fan noise and any RF coupling to a
minimum.
The power supply has an air inlet at the rear, and air outlets on the top. The highly efficient power supply
produces very little heat, but the inlet and outlet must remain open to normal room temperature air.
Accessory Equipment and Devices
One of the most common causes of amplifier failures or erratic fault protection alarms is installation of antenna
switches, lightning protection devices, or baluns with lightning spark gaps in high SWR lines. If your antenna
system has an SWR high enough to require an antenna tuner, do not use 50-ohm lightning protection devices
after the tuner.
Installation, Wiring, and Connections
The power supply is factory wired for 200-260 Vac. It uses a standard NEMA-6-15P 15-ampere 240-volt plug.
The round center pin is the safety ground. Do not remove the safety ground.
CAUTION!
Before
connecting the power supply to an electrical outlet, always be sure you
have completed the following four steps:
1. Insert the 15-ampere 250V fuses into the two black fuse caps.
2. Insert the fuse and cap assemblies into the power supply’s fuse holders. The fuses lock in place
with a slight turn.
3. Connect the power supply to the amplifier.
4. Be sure the amplifier power switch is turned
off
.
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