Last night I was adjusting the bass on channel 2 and the volume suddenly dropped. No noise, no popping just lower volume. The channel was still working but at about half power. I put the control back at its normal setting but the volume was still low. I switched back to channel 1 and it worked great.
I swapped preamp tubes one at a time with a known good set of backup tubes and no difference. I even swapped the power tubes and no difference. Channel 1 is working fine but channel 2 has lost power. The channel still works, but the bass and mid control doesn’t seem to do anything. All the other controls on that channel work fine.
I called Mesa today and the tech thinks that one of the pots may have gone bad. They are sending me new ones in the mail. Has anyone ever had a similar problem?
I swapped preamp tubes one at a time with a known good set of backup tubes and no difference. I even swapped the power tubes and no difference. Channel 1 is working fine but channel 2 has lost power. The channel still works, but the bass and mid control doesn’t seem to do anything. All the other controls on that channel work fine.
I called Mesa today and the tech thinks that one of the pots may have gone bad. They are sending me new ones in the mail. Has anyone ever had a similar problem?