So I have had my MB for 3 months now and when I first got it The main tune knob would always be at about 11 o'clock to be in tune with 440hz. I now find I have to keep retuning over the course of 2-3 hours.
When I first turn on the MB it will tune up very fast to normal pitch, about 4-5 minutes, and the tune knob is close to 12 o'clock postion.
After 15 mins I have to turn the tune knob down by 1/2 a notch.
After 24 mins I have to turn the tune knob down by 1 1/2 notches.
After 1hr I have to turn the tune knob down to 2 notches.
after 2hrs I have to turn the tune knob down to 2 1/2 notches.
I take it this shouldn't be the case and the tuning should be stable after 15-20 mins. So I shouldn't really have to keep retuning?
I'd be interested in anyone elses findings with their MB.