Good advice, I actually took that amp to the tech because the retainers were weak enough to allow tubes to fall out while driving around town. I had to load the amp upside down to keep it from happening. He re-tensioned them, but it is certainly worth checking. I drove all over town on my lunch break and nobody had the right fuse. I could find fuses, but every hardware store would have 1 amp, 2 amp, 3 amp, and 5 amp....nobody had a 4 amp Slo-Blo or equivalent. I guess I will have to order some and likely a new set of tubes. Sucks having to wait and see.