Leaving tube amps on.

This is a question I had for a long time. I know it’s not a good idea to leave tube amps on all the time because of tube life and safety reasons. But sometimes I don’t have the opportunity to listen to my system / music for hours at time at one sitting. Sometimes I can only listen to it 45 min - a few hours at a time during the day / night. So my question is would it be better to leave the amps on all day / evening and listen when I can or turn them on / off every time I listen even if is only  45 min at a clip. But to just clarify when I don’t intend to listen that day/ night they will be off. Does turning the amps on / off throughout the day / night do more harm than leaving them on ? Tube life , wear and tear on amps etc. btw I have the Audio Research Ref 750s. Ea amp has 18 KT150 , 6550WE , 6H30.  

128x128Ag insider logo xs@2xtattooedtrackman

@immatthewj No need to give a in depth explanation.

It was a reliability issue

My EE will keep a Tube Designed Device under scrutiny for weeks to ensure the circuit is not compromised.

Even when doing general repairs on any Tube Amp' the device is kept back to thoroughly check for reliability. This approach has lost lots of customers who want the device to be sent for servicing / repair returned within a week of having sent it away. 

I recall back in the 90's when Tubes Amp's were becoming quite popular, it was EE's like mine that were the resource selected to repair certain Brands Amp's as the producer did not know how to trouble shoot their faulty circuits.

I know my EE during the 90's has trouble shot a few Brands faulty circuits as a result of receiving Amp's that had multiple failures, usually as a result of extended periods of usage.  I also know some of the circuits worked on were fire risks, due to how the Output Valve / Tranxs could be affected. Maybe he has even more of these circuit corrections under his belt in the 00's ? I have not inquired for a long time. 

ghdprentice Plus 1!

Even with solid state, unless the amps have been unplugged for months, they will sound 99% after 15-30 minutes. My preamp and amps are hybrid, where the input stage (where the tubes are) shuts off, but the rest of the unit is left on. I turn everything one and after 5-10 minutes, they sound swell.😊

teach the children.

turn them and everything else not in use OFF.

It may not make a damn difference to you, but collectively it does, and it is environmentally irresponsible.

@pindac , well, the amp had been in service for many years and caps do occasionally fail, and I think that this failure was due to a mistake I made when I was doing something with the amp.

But, my point was: that if the amp was fully powered on and idling and that cap would have failed and no one was anywhere around, the bias would have climbed and continued to climb until I do not know what then happens. I did have an output tube fail catastrophically a long long time ago (I assume it was an internal short in the tube) and it blew the tube fuse on that side, but I still wouldn’t (on purpose) leave my amp on & unattended for an extended period of time.

Does turning the amps on / off throughout the day / night do more harm than leaving them on ?

in my view, no