Never hang your guitar tubes upside down as many horrible things may happen!!!
The heat from the electrodes will go directly to the base pins and cause problems with oxidization. The heat will also cause micro-cracks on the pins of the tube / valve, which could result in failures.
So don’t do it !!…….
Tags: amp, anode, Ashdown, Bias Engine, biasing, cathode, current, hiwatt, Hiwatt custom amp, KBO Dynamics, Marshall, Musikmesse, orange, technician, Technology, Tube Amp Doctor, tube failures, TubeSync Bias Engine, UK