I've just recently started taking an interest in tube amps. I'm making an attempt to build one from scratch using scrap parts and that is going along okay. But I just picked up this amp from a friend on the cheap, in an effort to learn even more and to have something complete to mess with should I need it. It's an Earth Sound Research 1x12 with a tube power section and solid state preamp. With the limited amount of info available on these, it's certainly feeling like a steep learning curve. My buddy says he had it working, but lost the fuse cap when he moved, so it's been sitting for a while. I put a fuse into it and put an ill-fitting cap on the fuse holder, flipped the switch and it blew the fuse immediately. Realizing I should probably have this plugged into a voltage limiter, I moved the plug to that and tried again. The bulb on the voltage limiter lit up, but the fuse didn't blow. Essentially, this is blowing fuses and not allowing me to power it up. If anyone has advice on where I need to begin fixing this, it would be very much appreciated. I do have a better fuse holder which I think would be a good thing to install, as well as a good start to this project. But beyond that, I'm still new at this.