The Xiegu G90 is a 20W HF SDR transceiver made by Chongqing Xiegu Technology Co.

Firmware

Firmware sources:

• Xiegu
• Radiodddity

Tools and guides for analyzing Xiegu G90 firmware: Firmware key extraction and bootloader extraction

Dale Farnworth's Xiegu G90 Firmware Updater provides the command-line program g90updatefw for uploading firmware to the G90.

Protocol

• Work to reverse engineer the protocol for the Xiegu G90's head unit

Hardware

USB CAT cable RF ingress problems discussed here.

Schematics

Mods

Replacing 5V LDO with SMPS by YO3HJV: Replacing the LDO regulators with Traco TSR 1-2490 and TSR 1-2450 reduces the RX power consumption by 40% (ATU) to 50% (no ATU) according to LZ1JER.