Tube Amp Archive

The power caps are all original Mallorys so an intermittent open cap could be the issue since they have about 48 years of mileage. Would a continuity test on the north and south poles reveal this issue? How shall I proceed other than visual inspection under the cover? Thank you for the response by t...

This problem developed during a gig in my friend's 66 Fender Super Rev. There had been an issue with his rectifier tube. The amp would blow fuses and some arcing in the rectifier tube was seen by the keyboard player seated behind the amp. We swapped his power tubes and the rectifier with two brand n...