The Xiegu XPA125B is a 100W PA and ATU all-in-one device for the Xiegu series radios. It helps fast build an up to 100W high-power shortwave transceiver with the Xiegu radios like the G90, X6100, X5105, G1M, etc. For most radios of Xiegu, you may need a CE-19 adapter to connect, while an L4001 cable for the Xiegu X6100. You can also make it work with Yaesu FT-817 or FT-818 with a CN-20 adapter. Below we provide guidance on XPA125B preparation before using X6100, X5105 or G90.

For Xiegu X6100

Please follow the XPA125B Preparation steps below before transmitting:
The Autotuner requires a constant carrier to tune properly. An SSB transmission does not provide this.

1. Select the band you want to operate on
2. Verify the XPA125B Band is the same as the X6100
3. Switch the X6100 to AM and set the output power to maximum
4. Press the PA switch on the XPA125B (if necessary) to return RX to OFF
5. Toggle the X6100 tuner to OFF (If Necessary)
6. Key the Mic
7. Verify that the radio is not operating in the Split mode unless operating on the same band for transmit and receive.
8. Long Press the XPA125B ATU button to initiate an antenna match
9. Unkey the Mic when the matching session is completed
10. Set the X6100 output power to 5 watts (not greater than 8 watts when using SSB using a power supply)
11. Toggle the XPA125B PA to ON
12. Switch X6100 to SSB

The XPA125B is now matching the antenna for the band and is ready to operate.

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For Xiegu G90

Please follow the XPA125B Preparation steps below before transmitting:
The Autotuner requires a constant carrier to tune properly. An SSB transmission does not provide this.

1. Select the band you want to operate on
2. Verify the XPA125B Band is the same as the G90
3. Switch the G90 to AM and set the output power to maximum
4. Press the PA switch on the XPA125B (if necessary) to return RX to OFF
5. Toggle the G90 tuner to OFF (If Necessary)
6. Key the Mic
7. Verify that the radio is not operating in the Split mode unless operating on the same band for transmit and receive.
8. Long Press the XPA125B ATU button to initiate an antenna match
9. Unkey the Mic when the matching session is completed
10. Set the G90 output power to 5 watts (not greater than 8 watts when using SSB using a power supply)
11. Toggle the XPA125B PA to ON
12. Switch G90 to SSB

The XPA125B is now matching the antenna for the band and is ready to operate.

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For Xiegu X5105

Please follow the XPA125B Preparationsteps below before transmitting:
The Autotuner requires a constant carrier to tune properly. An SSB transmission does not provide this.

1. Select the band you want to operate on
2. Verify the XPA125B Band is the same as the X5105
3. Switch the X5105 to AM and set the output power to maximum
4. Press the PA switch on the XPA125B (if necessary) to return RX to OFF
5. Toggle the X5105 tuner to OFF (If Necessary)
6. Key the Mic
7. Verify that the radio is not operating in the Split mode unless operating on the same band for transmit and receive.
8. Long Press the XPA125B ATU button to initiate an antenna match
9. Unkey the Mic when the matching session is completed
10. Set the X5105 output power to 5 watts
11. Toggle the XPA125B PA to ON
12. Switch X5105 to SSB

The XPA125B is now matching the antenna for the band and is ready to operate.