ac74ecu

I am having this same problem! The fuse was tight, I turned it with a screw driver and it came loose, replaced the fuse and the holder is no longer tight in the amp and will just fall out. It's not secure or pushed in all the way. I tried putting the old fuse back in to make sure I have the right size replacement (5x20mm 1amp 250V slow-blow fuze, radio shack P/N 270-1063) and it will not tighten down anymore. Did you or anybody find an answer to this or know what we're doing wrong? Thanks, AC