thx you, it's a good start to check.
my ubitx run with v5.1 firmware (that i can see on the screen at startup)
my oscilloscope can up to 50mhz,
yesterday, i have cheked the rf connector, i use SO239 instead BNC because my antenna and TOS meter is already PL/SO239
i 'll check this weekend, relay, coils, and test point, and back to you.