YO3HJV
Hamradio, Electronics& Stuff
XIEGU G90 Collection
(Move to ...)
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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17 December 2025
Last post on Blogger - Moving to Substack
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Well... There are some years from my first blog post and Blogger was good until posting became too complicated. Being a brave ham, I decid...
Lab599 TX-500MP
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Finally, finally, she/he/it arrived while I am still in Wien (OE1)! It was a little adventure but now I am in the select circle of Lab599 TX...
08 October 2025
Xiegu G90 squawk at high volume
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On the G90 Groups is an interesting discussion about an audio feedback (squawk) at high volume . The subject is now locked but I think it w...
15 August 2025
Baofeng DM-32 Desktop Charger YPT-C21A
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Baofeng DM-32 desktop "charger" isn't a proper charger but a desktop stand with a charging indicator. The charging circuit is...
07 August 2025
"My SD card is not detected by the Marauder"
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When using Marauder, an SD card it's a must. Unfortunately, the smallest SDcards i have are no less than 64GB so, according to the auth...
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