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  1. Repair Question New tubes making hissy, static noises

    Amp Building/Technical/Repair
    HI, I just installed a new set of tubes 3 weeks ago and am now noticing that when I turn on the amp it makes a static, crackly noise. Does that mean the power tube is gone? It is a Fender champion 600. 1 12ax7 and 1 6v6. This is really disappointing. It seems to ease up after the amp is on for a...