AMERITRON AL-811H Manual - Page 5
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Also for AMERITRON AL-811H: Instruction Manual (12 pages), Unpacking Instructions Manual (11 pages), Owner's Manual (19 pages)
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1.
Connect the RF output of the transmitter or transceiver to
the RF IN connector on the rear of the AL-811H 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-811H with any 50 ohm coaxial cable
capable of carrying 650 watts.
3.
Use shielded audio type cable with standard male phono
plugs to connect the RELAY jack on the AL-811H to the
exciter's normally-open amplifier keying circuit.
keying circuit in the AL-811H has a positive 12 VDC open
circuit and it provides 100mA of current when connected to
ground. The AL-811H has an internal back-pulse canceling
diode across the relay coil.
5
INTERCONNECTIONS
4.
5.
The
Connect the shortest possible ground lead 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.
Use a shielded audio cable with standard male phono plugs
to connect the ALC out jack on the back of the amplifier 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. Exciters with output powers
below 70 watts do not normally require this connection. If
this jack is connected without adjusting the ALC control,
the exciter may not develop any drive power.