AMERITRON AL-80B Specifications download pdf (Page 5)

INTERCONNECTIONS

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 amplifier keying circuit. The

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.

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.

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.

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AMERITRON AL-80B Specifications Page 5