still blows the fuse. Amp has EL34 and GZ34 tubes. I was playing with the volume cranked and I hit the amp with a fuzz. Instant quiet... 3A sloblo fuse is fried. I call the maker and a new rectifier tube is on the way because that what they think it is. So I bought a new tube today because I can't wait. I got a 5AR4 because that's all I could find today. I got a couple of fuses, put one in, power up the amp and nothing. Standby was still engaged. I pull the fuse and it's blown. What should I do now?