Really the problem was it is in vfo CLK # 2
I inserted the rf generator at approximately 52Mhz and now we have the normal operation of ubitx.
Probably some defect in SI5351.
Lucky I have another raduino board.
I leave here my contribution to who in the future find this same defect, and that apparently would be the TDA2822 and was not.
73 de Júnior