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‡E DC Power Terminal
Connect the HL-450B to a regulated DC power supply or 12 V battery using the included
DC power cord.
The red cord is positive (+) and the black one is negative (-). 60 A min. (peak) capacity is
required.
Use the supplied cord of the accessories or the equivalent wire size to avoid the voltage
drop.
‡F ALC Pot
This pot is used to adjust the ALC output level. When it is gradually turned
counterclockwise, a negative DC voltage is obtained and the RF output is decreased.
Adjust the pot so that the drive power stays within 50 W max, and/or the desired output
power level is achieved.
(This ALC pot works when the ‡G ALC terminal is connected to the external ALC input
terminal of the radio.)
In the case of 400 W output, the DC voltage up to -10 V max. is produced as the ALC
voltage.
(Refer to (6) at page 7.)
‡G ALC (Phono Jack)
Connect one end of the supplied ALC cable to ‡G ALC jack and the other end to the (Ext)
ALC jack of the radio. ALC helps suppress the over-drive to keep the amplified output
level at the desired level.
(a. Effective external ALC voltage differs from radio to radio. Usually -4 V to -6 V.
(b. If the radio is 50 W max model, or if the radio is worked modestly not to exceed 50
W output level, this ALC connection is not necessarily required.)
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