Leave tube amps always on?


Mark, the owner of Linear Tube Audio, suggested I leave my tube amps on all the time 24/7 if im listenting every day, and to turn them off if not using for a period of time, a few days or for example we go away.  His reasoning was that it uses considerable more energy to turn on/off on a regular basis. 

Do others agree?  Kinda risky since these NOS Mullard tubes ain't cheap and will soon be gone forever.   
aj523
@rtorchia Glad you found something you like better. If you like the sound and looks better, that's good enough reason to change. But if the only reason you got rid of your system was because it was hot and awkward, it's clear (a) you could have just turned your system off when not in use and (b) there are other more compact systems using tubes, including by Rogue, such as the Pharaoh. Just adding that for anyone who doesn't glean that your change was not forced by the options out there. There are options out there.
well at least the EE are more likely to have taken and passed Engineering Economics....
and as the dismal science, the ? is how many devils on the head of a pin.

I would cycle the preamp and amp off when not listening within the hour even as my Roger Modjeski designed RM-9 has a >10 k hour tube life.
I just bought a  Black Ice Fusion 3502 P Stereo Tube Power Amp (formerly Jolida) to replace my old Rogue Model 88 Magnum that took a dump for like the third time so I didn’t want to invest another dime in that amp.
The Black Ice may not be in the same class as the Linear Tube Audio but it sounds great to me. At least better than the Rogue.
The manual for the Black Ice states that they do not recommend leaving the amp on 24 hrs. a day as is the custom of some audiophiles to achieve max sonic performance on demand. While this is often recommended for solid-state equipment, Black Ice does not recommend this procedure for vacuum tube amps.
Now, there is a power switch on the back of the unit and one on the front panel. The one on the back is to be left on all the time. To operate the unit, press the switch located on the front panel to turn the power on. The indicator will flash red. Within a few seconds (seems longer) the tubes will begin to glow a soft orange color and the power switch will turn blue.
This was taken from the manual. I’m not exactly sure what is happening when the power switch is flashing ’red’ when first turned on but I assume that it’s some type of soft-start circuitry? I may be wrong as I don’t know enough about electrical engineering so I’m making an educated guess.
Anyhow, the manual clearly states not to leave it on all the time to preserve tube life.
Take that for what it’s worth but it seems like good sound advice coming directly from the manufacturer that I’m all too happy to follow.
If I plan to listen on and off during the day, I leave the amp on until I’m done for the day. It seems like it takes only about 5-10 minutes to warm up. But, I haven’t really evaluated the sound immediately after turning it on as I assume it’s not going to sound it’s best anyway so I usually give it 10 minutes before listening.
@nicktheknife 

i am surprised to hear of the unreliability of the rogue audio unit in your hands

was it an older or well used unit?  did you try to have them fix the problem?

i have had a eye on rogue, as a good, made in usa, brand of tube gear - the brand seems to have quite a few proponents on this and other forums, was perhaps going to try one sometime

now this gives me a little pause