YO3HJV
Hamradio, Electronics& Stuff
XIEGU G90 Collection
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Full schematics
Block Diagram and Schematic
G90 Faults and mitigation
Reflashing the Bootloader
Audio Amp Gain Mod
Power supply section
SMPS regulators instead of LDO
"COMM LOST" Error
MCU and DB9 reference
External Speaker Mod
Firmware Programming Cable Schematic
High Resolution Pics
Power Output vs Supply Voltage
Front Panel Backlight
ATU issues
ICOM RJ-45 Microphone with G90
Disassembly the Front Panel of G90
VFO encoder selection
On screen voltmeter
Repair Manual by XIEGU
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15 June 2023
Counterpoise? On the Use and Abuse of a Word - L. B. Cebik, W4RNL
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L. B. Cebik is my Antenna Guru! He is SK now but he wrote a lot of articles about antenna, introducing the antenna modelling into the ham wo...
Some usefull knots for field day or other things
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Knots are usefull in the day by day using of various things for camping, hiking, field days or who knows what and where. I will put them her...
11 February 2023
DC motor speed controller for Proxxon
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I have an old Proxxon tool and, like many old power tools, the built-in speed controller is not working anymore. So, I was thinking to do a ...
13 December 2022
ICOM AH-4 tuning aid with any radio
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Somehow, you end up into an ICOM HF eco-system. You have an IC-7300 or 7100 or 7000 or anything else; a radio that can do HF and you also h...
07 December 2022
Some considerations about voltage readout on radios
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From time to time, in discussion groups some fellow hams start worring about the voltage drop on the radio readout. This is from a Xiegu G9...
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