AMERITRON AL-811X Manuale di avvio rapido - Pagina 5

Sfoglia online o scarica il pdf Manuale di avvio rapido per Amplificatore AMERITRON AL-811X. AMERITRON AL-811X 13. Linear amplifier

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.

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.

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.

INTERCONNECTIONS

amplifier keying circuit.

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.

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.