AMERITRON ALS-1406/S, Инструкция по эксплуатации

Страница: 9 / 28

9
Introduction
The Ameritron ALS-1406 is 1200-watt nominal output, 160 through 6-meter amateur
radio band, solid-state amplifier. The ALS-1406 uses two 50-volt, conservatively rated,
linear MRFE6VP5600HR6 dual LDMOS FETs. These LDMOS FETs are specifically
designed for broadcast power amplifier applications. They provide exceptionally low
SSB distortion when compared to other solid-state devices. Fan speed is regulated by
temperature sensors; assuring conservative cooling with minimal noise.
Nominal driving power is 100 watts or less for 1200 watts output (approximately 11 dB
gain) on most bands. The compact 10” wide by 6-1/2” high amplifier package (depth
only 18”) fits nearly any station configuration. The attractive desktop amplifier unit
weighs only 24 pounds.
An external 50-volt 50-ampere regulated power supply powers the ALS-1406. The
supply is wired for 240 VAC (200-260 VAC, 50-60 Hz, 15 amperes), but can be rewired
for 120 VAC operation for lighter duty operation.
Power Supply
The external power supply for the ALS-1406 is a voltage-regulated current-limited
switching supply. It contains 14 volt positive and negative supplies, as well as dual 50-
volt 25-ampere continuous (30-ampere peak) fully current limited supplies. Each PA
(power amplifier) module in the ALS-1406 operates from independent 50-volt modules,
giving a total dc supply rating of 2500 watts average power and 3000 watts peak power
to the power amplifier modules.
Power supply to amplifier interconnections are through a heavy-duty cable using a large
Cinch Jones connector.
Power Line Requirements
This amplifier ships wired for a nominal mains voltage of 230 VAC. Maximum average
power-line current at full power output is 12 amperes at 240 volts. Two 250-volt 15-
ampere fuses fuse the power line. The switching power supply automatically adapts to
any mains voltage between 200 Vac and 260 Vac, and does not require adjustments or
tap changes within that range.
Note: 120-volt power mains operation is possible with a reduction in CW or RTTY
power. Because average power is very low, SSB operation is unaffected by 120-volt
operation. 120-V fuse size is 25-amperes maximum.
Power Supply Location
Locate the power supply in a convenient ventilated area near the amplifier location.
Avoid placing the power supply next to sensitive equipment, such as audio processors,
transceivers, or microphones. For safety, ground the wing nut stud on the supply rear to
the station ground bus. The station ground bus should comply with National Electrical
Codes. NEC and fire protection codes mandate directly bonding of station grounds to
the power-line entrance ground. If station ground rods are not bonded to the utility
entrance ground, likelihood of equipment or property damage and personal risk
increases.