The sbitx does have spurs but they are all well below the band noise (when the antenna is connected). If you have spurs, you might want to check with a different power supply.
There are no hardware changes at all to any sbitx v2.
hello I got a v2 model from a ham that was bought on 4-17-23 built..I am curious if any hardware changes were done to the v2 for the hamvention release..Mine seems to have a lot of birdies in the receiver across all bands regardless of different antennas tried..did the swr bridge calibration and rf calibration..any ideas or suggestions?