fluff191 said:
KH Guitar Freak said:
Pardon me, but I still don't get why you would change poweramp valves when the amp is turned on... :?
+1
Preamp tubes sure. I do that all the time. But power tubes? That isn't a good habit to get into.
Why not? If you understand what the standby switch does, you will know that it's just the same. There is no more risk from changing a power tube with the amp on standby than a preamp tube.
The reason for doing so is purely to save time backstage in an emergency situation. You will know immediately that you've got the new tube in the right way because the filament will light up without needing to flip the power switch.
