13
Water pipes can be used for an earth connection if the plumbing
is
all
metallic pipes.
The water meter or any other insulated junction should be bypassed with a jumper wire
clamped to the pipe at both sides of the meter.
Multiple ground connections are superior to a single ground connection. Ameritron has a
technical information sheet with addition suggestions for grounding. No grounding
terminal is provided for the power supply since it does not generate any RF signals. A
safety ground is provided by the power line neutral ground through the line cord and
plug.
Warning: Never remove or defeat the electrical safety ground connection on the plug
of this supply or a shock hazard may develop.
Power Requirements
Caution: The ALS-600 is not designed for operation for 12 Vdc operation
.
The ALS-600PS power supply is designed to match the ALS-600 amplifier. The ALS-
600PS/SPS provides 50 volts DC at 25 amperes along with 12 volts positive and negative
at low current for the control and bias circuits of the amplifier.
The power supply requires less than 12 amps at 120 Vac or 6 amps for 240 Vac. The
output voltage of the supply should be kept below 65 Vdc at no load for maximum
component life. If the no load output voltage exceeds 65 Vdc you must change the input
line voltage of the ALS-600PS. Refer to the "Line Voltage Modifications" section in this
manual. The ALS-600SPS no load voltage should stay within .1 volt of 50 volts.
INTERCONNECTIONS
1. Connect the RF output (ant) of the exciter to the RF IN (SO-239) of the ALS-600
with a good quality 50 ohm cable capable of handling 100 watts.
2. Connect the station antenna system to the RF OUT (SO-239) connector with 50 ohm
coax that will safely carry 600 watts. This is where the Low-Pass filter, antenna
tuner, antenna switch and other accessories connect.
3. Use shielded audio type cable with standard male phono (RCA) connectors to connect
the RELAY jack of the ALS-600 to the transceiver or transmitter, normally open,
amplifier relay terminal. This connection has 12 volts open circuit and supplies less
than 100 mA of current when pulled to ground. There is a back pulse canceling diode
in the amplifier for exciter protection.
4. Connect the ground stud (GND) on the amplifier to the station ground buss with as
short a lead as practical.
