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The meter’s rightmost scale-arc indicates PEP reflected power in watts on the upper
scale numbers and pickets. Notice power meter calibrations are not evenly spaced.
Lower scale numbers and pickets are evenly spaced, and are for all other functions. The
lower right scale is used for relative ALC setting, power amplifier module voltage (0-70
volts), and power amplifier current (0-70 amperes). Nominal voltage is 50 volts;
maximum safe current is 25 amperes. Maximum safe output is 600 watts peak;
maximum safe peak reflected power is 125 watts.
Back Panel Connections
Figure 3 ALS-706 Back Panel
POWER INPUT
The power supply must be unplugged from the power mains before installing or
removing this connector. This connector is indexed by a slight vertical offset in
the two round index pins. Observe spacing offsets to correctly mate the pins.
Seat the male plug fully onto the amplifier rear panel male connector pins. After
seating, the power supply can be plugged into the AC mains outlet.
ALC
Optional connection. Connects to radio ALC input and provides power limiting.
RELAY
Connect to radio amplifier keying line. Radio must pull this 14-volt 15-mA line
below 1-volt to transmit.
GND
Connect to station ground bus, if available. This connection is primarily for extra
safety.
Summary of Contents for ALS-706
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