7
2-4. Connections
Connection to your station must be accomplished in the order described below before you apply
mains voltage to the amplifier.
W A R N I N G
Note that the grounding system may have to withstand currents over 20A
with minimal voltage drop. Therefore, it may be necessary to improve
grounding system conductivity with heavier conductors and a
lower-resistance ground path. The grounding conductor should be at
least 8mm
2
(AWG 8 or SWG 10).
Fig. 2-1 Connections
a) First, connect the ground stud of the amplifier (on the rear panel, marked GND) to the
station's grounding system (Fig.2-1).
b) Connect a coaxial cable with a PL-259 plug from the transceiver output to the amplifier rear
panel RF INPUT socket.
C A U T I O N
If this is the first time you are using a power amplifier in your station, pay close
attention to the coaxial cable type from the amplifier's three outputs. The cable
must be capable of handling the increased power levels, particularly on the 10m
and 6m bands. We recommend that you use RG213 or better coaxial cables.
Consult your local cable supplier for the appropriate cable selection. This caution
applies equally to the antenna selector, tuner and antennas system as well.
c) Connect a suitable coaxial cable from your antennas to the appropriate amplifier output on the
rear panel, marked ANTENNA 1, ANTENNA 2, and ANTENNA 3, using PL-259 plugs with PTFE
insulation.
d) Run a cable terminated with a phono (RCA) connector from the transceiver socket providing a
"ground on transmit" (PTT) control signal to the amplifier rear panel KEY-IN socket.
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