I recently acquired an Acoustic B20 that was not working. I opened the cabinet to reveal a blown fuse. I thought great this should be an easy fix. I initially replaced the blown T315mA with a .315A from Radio Shack only to find that these fuses were blowing instantly. After more research I found that the "T" meant slow blow or time delay and that the fuses I had gotten were fast acting. So back to Radio Shack. This I would later realize was where I really goofed. I mistakenly got T3.15A fuses. Put one in and vuala! The amp fired up..... For about a minute until one of the caps started to smoke and ooze. So it appears by putting the larger fuse in I defeated the purpose of the fuse and allowed the problem to damage the next weakest link. The strange thing is that the amp still works. For how long I don't know. Can anyone advise me on what the problem might be and if and how it could be fixed??