AMERITRON ALS-606, Instruction Manual

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Version 0A 8
mains supply, you may have to use a dedicated 120-V amplifier line, or rewire the
supply and use 240-volt mains.
With 120Vac mains at 600-watt nominal RF output, current draw is approximately 12
amperes on steady carrier. Peak line current is typically much less than 8 amperes at
600 watts PEP on SSB voice.
The ALS-600SPS can be located anywhere, within reach of interfacing cables,
convenient to your operating setup. The location must be dry, airflow must not be
restricted, and outside temperature must not be over 120F (49C). You must not extend
or shorten the amplifier to power supply cable.
Exceeding safe power supply load current forces the switch mode supply into shutdown.
Restore operation by turning the main power switch off for a brief time. If the power
supply detects a permanent overload or the supply has failed, the supply will not reset.
ALS-600PS
The ALS-600PS uses a standard transformer with choke input filter system. It weighs
significantly more than the ALS-600SPS, and is not voltage regulated.
The ALS-600PS requires a 100-130 Vac, 50-60 Hz, 15-ampere or larger mains supply.
This supply is reconfigurable for 210-250 volts by moving internal jumpers. The line cord
uses a standard USA NEMA 5-15P two-wire male plug with safety ground.
This supply is unregulated. Voltage range includes all typical residential power line
voltages, but the internal buck-boost winding must be reconfigured if output voltage is
more than 58 volts no load. Operation with no load voltages over 58 volts can
compromise FET reliability.
With 120Vac mains, current draw with steady 600-watt carrier is typically around 12
amperes. Line current is typically less than 8 amperes at 600 watts PEP SSB voice.
The ALS-600PS normally provides the same performance at 120-volts as at 240-volts,
unless the power mains have excessive voltage drop. If you experience light dimming or
line breaker opening, move the supply to a dedicated 120-V line, or reconfigure the
supply for, and use, 240-volts.
This supply does not have overload protection, other than standard fuses.
See the “Power Supply Line Voltage Settings” starting at page13 for changing the line
voltage settings.