When the noise level behind the music becomes noticeable! Power tubes usually go first. Small signal tubes can last way longer - 10X that of output tubes!
When it sounds like a tube amp needs rejuvenating,
how can you determine whether the power tubes or the output tubes need to be replaced ? Or both ?
My amp is the VAC Phi 300 running 4 Psvane CV-181's up front and two quads of Shuguang Black Treasure KT-88's behind them.
Thanks -
-john
My amp is the VAC Phi 300 running 4 Psvane CV-181's up front and two quads of Shuguang Black Treasure KT-88's behind them.
Thanks -
-john