The 2950 (especially the newer versions) is somewhat prone to VCO drift. Improper filtering in the PLL is more than likely the culprit. That said, get the service manual for the radio and have a look at the reference oscillator, VCO and BFO tuning. You'll need a frequency counter to perform the procedure, and a decent oscilloscope with 80-100MHz vertical bandwidth is also a help when peaking the VCO adjustments.I fixed one of these rigs last fall for a ham friend. They're not that tricky to align but seem to go out of alignment more frequently than similar 10M monobanders.