Farhan,
On the sBitx that I received, there is a 2n7000 MOSFET soldered on the underside of the main board.? I have not been able to find it on the schematics.? Is it required?? If so, the schematic should be updated.? Here is a picture I took before I removed it when it was blown with my failed software-based sequencing mode:

73
Evan
AC9TU