User's Manual

11
ADJUST THE ALC
ALC is a negative voltage generated by the amplifier to limit power from the radio, which allows you to
enjoy a broadcast signal of relatively the same strength across the bands on which you operate. If you use
this feature, you must adjust it as described below. This adjustment will be different for every radio. The
MERCURY LUX does not need ALC to function as you can easily control your final output by adjusting
your transceiver’s power level.
The amplifier provides a full output power of 1300 - 1500 Watts in HF bands. For 50 MHz, the output
power does not exceed 900 Watts. The input level is different in each band segment; the use of ALC is for
constant output in all bands without regulating the input power.
How to adjust ALC:
1. Connect Amplifier to a dummy load.
2. Connect an RCA-type cable from the ALC port on the amplifier
to the ALC port on the transceiver. Note: Some Transceivers do
not have an RCA-type for ALC.
3. Turn the regulator completely to the left, counter-clockwise.
(Green Arrow)
4. Set the transceiver output to 50 Watts. The 20-meter band is
recommended for this adjustment.
5. Begin to modulate and turn the regulator to the right, clockwise,
(Yellow Arrow) noting that the power will be low and will begin to
rise (2).
6. Stop when you see the level bar in approximate peaks of 1300 Watts for linear gain on all bands.
Note: Some Transceivers have a narrow adjustment and may not be compatible with the ALC voltage
range of the amplifier
WARNING: Do not exceed input drive more than 20-Watts for (RTTY, CW, AM, FM, DATA) Modes.