a) GND stud
First, connect the wing-nut ground stud of the amplifier (on the rear panel, marked GND) to the station's
grounding system (see Figure 2-1 Rear panel - Connections, Pos. (a)).
WARNING
Note that the grounding system may have to withstand currents over 20 A with
insignificant voltage drop on it. Therefore, it may be necessary to improve it
considerably, i.e., to become less resistive, with heavier leads and lower-resistive ground
path. The grounding leads should be at least 8 mm² (AWG 8 or SWG 10).
b) RF INPUT socket
Connect a suitable coaxial cable from the transceiver output to the amplifier RF INPUT SO-239 socket (see
Figure 2-1 Rear panel - Connections, Pos. (b)), using PL-259 plug.
NOTICE
In order to avoid a damage, turn off your transceiver's internal antenna tuner.
c) ANTENNA 1, ANTENNA 2, and ANTENNA 3 sockets
NOTICE
If this is the first time you will use a power amplifier in your station, pay attention to the
coaxial cable type from the amplifier's three outputs to the antennas. It must handle the
increased power safely, particularly on the 10- and 6 meters bands. We recommend that
you use RG213 cable or better. Check the same for the antenna selector and tuner as
well as the antenna system.
Connect a suitable coaxial cable with a PL-259 plug (with PTFE insulation) from the appropriate amplifier
output (marked ANTENNA 1, ANTENNA 2, and ANTENNA 3, see Figure 2-1 Rear panel - Connections, Pos. (c))
to the antenna selector or tuner, or to the antenna for the respective frequency band.
d) KEY-IN socket
This is the amplifier's input for receive/transmit control from the transceiver.
The transceiver controls the amplifier from receive mode into transmit mode (RX/TX) by grounding of the
KEY-IN input.
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