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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23 January 2024
MESHTASTIC TTGO T-Beam V.1.1 Power On issues
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A few weeks ago, I start to play with Meshtastic using two TTGO - TBeam V.1.1 LoRa boards based on ESP32 MCU. Because plans are to use the...
06 January 2024
TC4056 1 cell LiIon charger module
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I have a lot of those little boards made around a TP4056 IC. According to the datasheet: The TP4056 is a complete constant-current/constant-...
06 December 2023
Portable GPS barometer UTC Clock
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Often, in portable I have to use the phone to check for Maidenhead QTH Locator and UTC for logging purposes. Looking into my junk box I fo...
1 comment:
06 November 2023
Microphone preamplifier for DC powered (phantom) input
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I found this by the grace of FB who reminded me about it (10 years). A customer came with a specific request: to increase the volume of the ...
26 October 2023
RF Ammeter to trim antennas
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I started playing with End Fed Half Wave antennas this summer. While I found some interesting facts about high impedance Un-Un transformers...
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