Hi, Have a Jim Kelley amp that is running *really* hot (even for a Jim Kelley) at 520 volts on the plates, roughly same on the screens of the 6V6s. Design is for like 477, already over spec, but at 520 there are not many 6V6s that can take it for very long. Anyone know what options are there to "correct" this problem, bring the amp more into spec with what it is supposed to be? Note that a previous tech installed a power resistor, and it worked for a while, things were very hot inside there, and the resistor eventually fried. Oh yeah, I would like to use 6V6s, not 6L6s.. Thanks! P.