- uBitx v4.3 won't Transmit
Re: uBitx v4.3 won't Transmit
Patrick Peter Rosney
toggle quoted messageShow quoted text
Still back at square one with this Radio ... measured 0.4V between Pin 2 ( blue wire ). and Pin 5 ( orange wire ) of the Raduino whether the Key is pressed or not ...
not very good at following & reading circuits so don't know where to look or go next
Radio receives lovely but will not transmit when I press my key ...
Have this radio left to one side
Yes, I would say that the PTT and CW KEY signals are not getting to the Raduino/Nano as the most likely cause. I would trace out the Orange or Blue wire from the Raduino control header and try shorting one of them to ground. That should put the uBITX into transmit. If not, then you may have an issue with the Nano on the Raduino board.
If shorting the wire does put the radio into TX mode, then I would look at the ground connections of the two 3.5mm jacks. The ground wire may have broken off. Trace out the Yellow wire from the Raduino connector and verify that it is going to the shield connections of the two plugs.
Join BITX20@groups.io to automatically receive all group messages.