Tube power amp - keep on continually?

Thanks for all the advice. I will turn it off when it is not in-use.

Alan

I agree. Do NOT leave tube power amps fired up unattended. Proper use calls for a warm-up time ( 5 - 15 minutes depending on design ) prior to use and then a "heat-down" time prior to shut-off. Cranking signal from the tubes before they are fully warmed and / or turning them off before they've had a chance to cool off causes extra thermal stress on them, which leads to premature failure. Sean
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Sean can you explain cool down time before shutting the amplifier off? Like how long to wait? Never heard about this before? Would this apply to a class A triode tube amplifier also?

Cool down time, may be that is why everything I turn off the amp, there is a "DIN DIN DIN" sound from the Rogue M-120, I believe is from the output tubes. Thanks Sean

Yep topvideo, that's probably the sound of the glass contracting as it cools. Similar to an aluminum engine block after your shut off your car. tink, tink, tink. except there its the metal.

My tubes to the same thing.