Funny sound from tube setup


Looking for some sage advice on how to find out what tube needs replaced in my tube amp/pre setup. What tubes do you start with?

I checked my bias on the KT 88's and they were spot on, I imagine this means these are ok. One of my other amp tubes has what appears to be a black top instead of a silver top. Never looked that close at the tubes until now so I'm not sure if it just like that. What should I try next?

Jack
gooddomino

Showing 1 response by elevick

BUY A TUBE TESTER! They are cheaper than a set of kt88's. Usually your power tubes will last 1000 hours or so. Pre/gain tubes will last 5000 to 10000 hours. So, if you got your tubes all new, the power tubes would wear out first.