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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30 September 2024
Meshtastic ESP_32 DevBoard
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Everyone know MESHTASTIC! It is the promise of a new communication meaning over long distances and without any infrastructure needed. Someth...
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Kenwood TH-D74 battery indicator and some battery measurements
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During the years of use of my Kenwood TH-D74 I noticed that the battery indicator is a little bit confusing. I never knew precisely how muc...
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Switched Mode Power Supply for Battery replacement in R-105m, R-108m, and R-109m radios
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I do have an old Soviet "green radio" R-109m which can cover 21.5 to 28.5 MHz which makes it pretty attractive for playing in th...
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Expansion board for ESP32 D1Mini
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Well, after testing a lot of ESP32 development boards, I found that the little ESP32 D1 Mini is an excellent one. First of all, it is ve...
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