I set aside a few hours to build the U3S from QRP kits.
The build went fairly well, the instructions are fairly clear. When I first applied power it was obvious that something was wrong. What I saw on the display was not what I expected to see.
I did some fault finding and came to the conclusion the 20 MHz clock was not functioning. I carefully removed the crystal and replaced it with a temporary 10 MHz crystal.
I then powered the U3S up and I was very pleased to see “Diagnostic mode” displayed on the display.
Tomorrow, I will try and find a suitable replacement crystal. Then hopefully I can set it up to WSPR to the WWW on 10m.
What a relief……
|Start of build|
|This is a problem !!|
|Mainboard, display (not visible), synthesizer and 10m low pass filter|