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Product Reviews

February 2023

Xiegu XPA125B 1.8-50 MHz 100 W Amplifier

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Summary of Contents for XPA12B

Page 1: ...Product Reviews February 2023 Xiegu XPA125B 1 8 50 MHz 100 W Amplifier...

Page 2: ...80 W on 6 meters typically with less than 5 W of drive Transmit and receive switching is provided by an internal relay There is an amplifier bypass switch and the XPA125B is also bypassed when it is...

Page 3: ...put versus output The XPA125B display power readings are compared to a NIST traceable Array Solutions PowerMaster input and Mini Circuits PWR 6GHS sensor and calibrated attenuators output The first th...

Page 4: ...0 M 1 0 W 0 1 W 68 W 63 W 18 0 dB 6 9 7 2 0 W 0 1 W 86 W 82 W 16 1 dB 8 8 3 0 W 0 2 W 91 W 87 W 14 6 dB 8 5 9 4 0 W 0 3 W 93 W 89 W 13 5 dB 8 8 9 5 0 W 0 4 W 97 W 94 W 12 7 dB 9 1 9 6 M 1 0 W 0 1 W 37...

Page 5: ...throttle the output back from full power to achieve the cleanest signal from the amplifier on any band The amplifier showed another unexpected anomaly The input power was reading significantly low on...

Page 6: ...well by providing keying and auto matic band changing for the XPA125B The XPA125B control interface is a miniDIN6 connector so I built interface cables for the KX3 and the QCX mini using a mini DIN6P...

Page 7: ...CW Hotline has included a trace on the printed circuit board PCB to a jack input for your key There aren t any surface mounted parts which is good for new hobbyists Altogether there are just over Ham...

Page 8: ...center post One nut was below the PCB and one nut was above the PCB followed by a washer on top for grounding I have found this solution to work effi ciently and have yet to feel the need to tighten t...

Page 9: ...practiced sending Morse code between units and noticed a slight delay people discussing the CW Hotline it is usually to practice code over the internet However having the ability to operate CW remotel...

Page 10: ...to improve as I keep practicing and testing myself online against others in the VBand Manufacturer Ham Radio Solutions www hamradio solutions Price kit version 50 each plus shipping assembled version...

Page 11: ...rollers together There s a legacy DB9 SERIAL RS 232 computer control port a LAN Ethernet RJ 45 port to control the unit over IP a USB B port USB for computer control a USB A port FW for keypad connect...

Page 12: ...ell explained in the manual If you re just swapping a controller of an existing rotator you can skip the cen tering procedure The next step is the calibration pro cedure This is to ensure that the con...

Page 13: ...a specific DXCC country or prefix or particular WAZ or ITU zone to turn your antenna in the proper direction Touching the NEW azimuth will toggle between the short and long path bearing It shows that...

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