Listening for tube degradation


Hey, just wondering what specifically there is to listen for in regards to tube degradation. I don't have access to test equipment so I have to rely on my ear to determine if certain tubes are on their last legs. I've been able to notice a definite "scratching" or muddied sound whenever one or more of the tubes are in need of replacement. However, I find myself replacing ALL of the tubes since I can never pinpoint which exact tube or tubes needs replacing. Also, are there any visual cues to look for (ie.output tubes glowing brighter than others)? I have a 15W integrated tube amp that you can look at on my system page.
hitman_hifi

Showing 1 response by drjjpdc

Newbie, how often do you listen, because 2000 hrs on power tubes at 2 hours every day equals about 3 years? I don't have any friends that put that many hours on their system.