My amp is sounding a little stronger on the right side than the left. The balance control is at the center. Could it be that one of the tubes are burning a little brighter than the others (especially the two right ones)? If yes, any suggestions on how to bias these tubes? Thank you in advance for your responses.
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08-15-06: Tvad Swap the tubes from the right channel to the left. Does the weak channel follow the tube swap? If so, then one or both of the original left channel tubes are going bad. Swap the left and right channel tubes back to their original positions one by one, and listen for any changes upon each swap. You should be able to narrow down the culprit.