I was in the middle of recording when I had a sudden drop in volume. I had my model t running through a 16 ohm cab, turned up to 6. The amp was distorted and it would not get any louder from 3 to 10 on the volume. When this happened I checked to see if I had the ohm select switch at 16 ohms, which it was. Then I started to phase out pedals thinking it might be a battery going dead, that was not it. Then I tried running the guitar strait that was not changing the the situation. So I started to think it was the output of my guitar so I tried it through a different amp, so it is not my guitar. I took it in to an amp tech and he check it out and said he could not find anything wrong with it. He clean and re-tightened the tube sockets, re-biased the tubes, and cleaned the pots. I tried it out this pass weekend. I let the amp warm up for about 5 minutes. turned the stand by off and started playing my guitar, which at this point I just ran the guitar strait. I was sniffing around to make sure nothing was burning, when I notice 2 of the power tubes(closest to the output transformer) were running hotter then the other 2. It sounded the same as it did when I loss volume initially, but more distorted.The drummer in my band has a friend who has a tube tester and can re-bias tubes so on Sunday we took my amp over to him and spent about 2 hours testing and re-biasing the tubes. He played through 2 different cab and still the same problem. He seems to think it is one of two things, either the caps are going bad or the out put transformer is starting to go bad. We looked at the guts and he noticed some of the caps have been replaced, but not all of them There was no burn marks and it looked real clean. I would like to see what you folks have to say to see if maybe it could be something else. If anyone has had this happen to them, could you let me know what remedied the problem. I am hoping it is just the caps, as that would be the cheaper one to fix. If in fact it may be the output transformer does anyone know of where to get them for cheap?
Thanks for any info or help it will greatly appreciated.