Don
28 watts on 80m?? most of us are around 10 watts - could be an inaccurate power meter - or if you really are doing 20-some watts you could be over-driving badly.?
notice I am suspicious that relay itself may be still okay ....
you might have some RF getting into raduino that is locking it on transmit.? at the same time, its not wise to make this much RF with the ubitx - you could be jamming all kinds of fellow hams - for not much benefit on FT8.? if it does not lock up when doing SSB voice - another clue it may merely be too much drive into the PA.?
much better to solve it with an adjustment than to take the ubitx into unnecessary surgery!?
Curt
