AMERITRON AL811 Manual de início rápido - Página 5
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1.
Connect the RF output of the transmitter to the RF IN
connector on the rear of the AL-811 with 50 ohm coax. Use
any 50 ohm cable (RG-58 is fine) with PL-259 plugs.
2.
Connect the existing station antenna system to the RF OUT
connector on the AL-811 with any 50 ohm coaxial cable
capable of carrying 500 watts.
3.
Use shielded audio type cable with standard male phono
plugs to connect the RELAY jack on the AL-811 to the
exciter's normally open
keying circuit in the AL-811 has positive 12 VDC open
circuit and provides 100mA of current when pulled to
ground. The AL-811 has an internal back-pulse canceling
diode across the relay coil.
5
INTERCONNECTIONS
amplifier keying circuit.
4.
Connect the shortest ground lead possible from a good earth
ground to the GND terminal. The best leads are solid
(instead of stranded or braided) copper. It is also best to
use a common ground point for all the equipment in the
station.
5.
Use a shielded audio cable with a standard male phono plug
to connect the ALC jack to the negative going ALC input
jack on the exciter. Do not connect this line until you have
read and understand the function of the ALC circuit.
The
Exciters with output powers below 70 watts do not normally
require this connection. If this hack is connected without
adjusting the ALC control, the exciter may not develop any
drive power.