There is a 50Hz hum on the Reverb section, only present when one or both reverb tabs are on. Clearly picked up from the mains supply somewhere so probably a poor connection or failing capacitor in the reverb amp or reverb circuit.
The Pedal drawbar is noisy when moved, probably just dirty contacts.
A couple of keys on the upper manual have intermittent contacts, only apparent on some drawbars. Busbar shifting may fix this.
In addition to these minor problems, the Vibrato system has almost completely failed. With vibrato selected the volume is dramatically lower than normal, and serious distortion occurs when two or more notes are played. This is probably a bad valve (tube) or contact somewhere.
The scanner appears to be working as when playing just one note the sound is correct although much quieter than it should be. (The note is barely audible even with the 'volume soft' tab off and the swell pedal wide open).
The vibrato was working properly only a few days ago, so this is a very recent failure. It's not over oiling either, since only a small amount of oil went into the scanner tray, and the scanner is still working.
Unfortunately, failures like this are inevitable with 40+ year old electrical equipment.
The next repair will be to clean and lubricate the tabs and drawbars once some contact cleaner and lubricant is obtained.
0 comments:
Post a Comment