Elecraft KXPA100 Manual - Manual (Page 13)

13
Connections to the Amplifier
Secure all cables to avoid placing strain on them. This is especially important when the
amplifier is mounted vertically with the cables on the bottom or in mobile installations with
significant vibration.
If you are connecting the amplifier to your KX3 using the optional KX3 to KXPA100 Adapter Cable, connect
the amplifier as described below under Amplifier Connections using the KX3 to KXPA100 Adapter Cable.
If you are using the amplifier with any other transceiver or not using the optional Adapter Cable with your KX3,
connect the amplifier as described under on page 16.
Amplifier Connections using the KX3 to KXPA100 Adapter Cable
Figure 3 shows the connections required. See the following text for details of each cable and its function.
The adapter cable may be used only with a KX3 transceiver. If you have a Yaesu FT-817 and the required
interface cable, turn to Amplifier Connections using the FT-817 Interface Cable on page 16. If using the
KXPA100 with any other transceiver or a KX3 without the adapter cable turn to Amplifier Connections for
Basic Operation on page 18.
An amplifier with the optional KXAT100 antenna tuner is shown. If your amplifier does not have the antenna
tuner option, you will have only one
ANT connector. Otherwise there is no difference in the connections.
These circled numbers in the following notes refer to the corresponding numbers on Figure 3.
Ground Connection: Connect the station ground to the thumbscrew. A good station ground with short,
direct leads connecting each piece of equipment is important for consistent, reliable operation.
DC Power Connection:
CAUTION
If the station power supply is energized, be sure the power switch on the front panel (see
Figure 7 on page 21) is in the
OFF position before proceeding.
Connect the Anderson PowerPole® connector to either mating connector on the back of the amplifier.
Red goes to red and black goes to black. Connect the other end to your power supply with the black
wire connected to the negative (-) terminal.
To avoid excessive voltage drop under full load, keep the lead length as short as possible. Also,
connect the dc supply to the lower connector. It has a slightly more direct connection inside the
KXPA100. The second PowerPole® connector on the amplifier is paralleled with the first. It can be
used to extend power to other equipment such as the KX3 transceiver using the cable supplied as part
of the optional KX3 to KXPA100 Adapter Cable set.
If you experience excessive voltage drop due to the resistance of the power cable, you can use the
second connector for a second parallel lead from your power supply. If used, the second power lead
should be fused identically to the first at the power supply end of the cable.
If you connect cables to both Anderson PowerPole® connectors, we recommend you tie the two
cables together with a cable tie. That will greatly increase the force needed to pull the cables out of
the connectors on the amplifier.
Notes Continued Following Figure 3.