We built five U3S kits in our local radio club reported at ? After assembling everything we`ve now trouble with 3 kits. The system starts correct, the GPS-modul works fine and the heart is pulsing in the display. The system switches to TX ?(WSPR) and we can hear the transmission in the separate receiver. The TX QRG is correct but we get no report at at all. Is there any idea for troubleshooting? The measured power output is abt 120mW - software V 3.12?

73