Could this be power problem? cause i only power it from laptop through FT232RL FTDI USB-C to Arduino Pro Mini
Yes, that's the issue I raised in post #7
Its possible that the FT232 cannot supply enough power for the transmitter.
They're not the sharpest of pictures, so all I can say is that a lot of those solder joints might need to be redone. It's been so long since I asked that it's apparently not urgent so I won't pursue it further. Good luck!

