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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07 June 2020
ICOM IC-7100 Headless test
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After carefully reading the whole user manual (lol...) I came out to an interesting MENU setting. FUNCTION>POWER OFF(With No Controller) ...
03 June 2020
Driving one-coil latch relay without H-Bridge
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The figure below shows a simple circuit using the MC9S08QE128 microcontroller from Freescale to drive a Finder 40.61.6.005 single-coil la...
02 June 2020
External ATU
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Just a random thought. Often I see people using relatively tunable antennas with their radios and, from no reason (at least, not a technic...
10 May 2020
HF Arduino Beacon project
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I plan to make an Arduino CW beacon. This are the features I was thinking of: -Connected to ICOM IC-7100 via CI-V serial interface; -C...
05 May 2020
MFJ-5124I cable schematic
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Pin 1 (Key) connects to the Tip of 3.5 mm Stereo Phone Plug. Pin 2 (Start) connects to the Ring of 3.5 mm Stereo Phone Plug. Pin 3 (+13.8V) ...
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