AMERITRON ALS-600 - GENERAL INFORMATION; Amplifier; Low Pass Filter Selection; Power Supply

GENERAL INFORMATION
Amplifier
The Ameritron ALS-600 is a 600 watt nominal output, solid state, linear amplifier using
state-of-the-art, high voltage, RF TMOS FET devices in the power output section. The
ALS-600 provides continuous frequency coverage from 1.5 through 22 MHz with no
tuning required. Broad-band 5 pole low pass filters provide output harmonic suppression
in excess of all FCC requirements. The MOD-10B kit provides operation up to 30 MHz
(copy of a valid amateur license is required to purchase the MOD-10B).
The ALS-600 uses four MRF-150 FET's operating at 50 volts in a double ended push-
pull parallel output configuration. High quality RF components combine with an
accurate peak detecting directional coupler, front panel adjustable ALC circuit with
automatic SWR foldback, and one switch frequency selection to make this one of the
easiest to operate amplifiers available. The matching power supply, an ALS-600PS or
ALS-600SPS, is shipped factory wired for 120 volt, 50/60 Hz power mains. The power
supplies are easily converted to other supply voltages between 100 and 240 volts.
Low Pass Filter Selection
Low pass filter networks must be selected for the different HF frequency ranges in order
to meet FCC requirements. The ALS-600 uses relay-selected low pass filter networks to
permit the selection of the proper filter networks by three different methods:
• The FREQ switch on the front panel of the ALS-600
• The band switch on the optional ALS-500RC Remote Control Head
• Automatically by the optional ARI-500 Automatic Band Switch
Power Supply
The ALS-600PS power supply is designed to power the ALS-600 amplifier from 50 to 60
hertz AC power mains that range from 100-130 VAC and 210-240 VAC. The ALS-
600SPS has a terminal strip where the AC voltages can be selected as either 120 or 240
volts 50/60 Hz, and will safely operate from 90-135 VAC in the 120 setting, and 185-260
VAC in the 240 VAC setting. All ALS-600PS/ALS-600SPS supplies are wired for
standard 120 volt systems and are shipped with a NEMA 5-15P three wire plug.
Both power supplies provide the power required to operate the ALS-600 in typical
continuous amateur service at 600 watt output levels. The ALS-600PS/SPS power
supplies provide the three DC voltages required by the amplifier unit. The high voltage
section supplies approximately 50 volts at a load current of 25 amperes.
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