Thanks Erik, my system is going through changes all the time (as most of us here) in my pursuit of music nirvana, however the main equipment remain the same, i.e. my CD94 transport, Steven's kdac, and my amp JLTi EL34. I'd like to keep them "on" all the time just like my all SS bedroom setup but the thought of burning precious NOS tubes all the time is.......it's just too expensive!
If I own a Ming Da MC34AB or killer EL34 I would be more desperate!
For the time being I am doing exactly what you're doing, play the first 3 hours for background music only, then spend another 2 or 3 hours to have an enjoyable musical session. You see 50% or more of my listening session is for background music, hence looking for possible solutions now. B+ switch looks good, so I will talk to Joe R. or other tubes technician about installing them.
Cheers,
William