Mlsstl and Timrhu, FWIW, a warranty covers exactly what it sez it covers (so long as it conforms to any State laws regarding warranties), not what you would like to speculate it should or should not cover. I don't see that Transl has ever told us what the warranty actually said.
While I'm a bit confused by the multiple comments regarding tubes initially rolled in, it looks to me as if the only tubes were the small tubes, not the power tubes, and I agree with those who have said that substituting brand A 6922 for brand B 6922 (for example) should not affect the operation of the amp and the failures experienced by Transl. Had Transl identified the actual amp perhaps someone here with hands on experience could have helped him. FWIW, something tells me that the problem lies in the standby curcuit's operation.
While I'm a bit confused by the multiple comments regarding tubes initially rolled in, it looks to me as if the only tubes were the small tubes, not the power tubes, and I agree with those who have said that substituting brand A 6922 for brand B 6922 (for example) should not affect the operation of the amp and the failures experienced by Transl. Had Transl identified the actual amp perhaps someone here with hands on experience could have helped him. FWIW, something tells me that the problem lies in the standby curcuit's operation.