Onemug, your concern about fires has application only to tube amps. I have never left my tube amps on when I am not there, even though it typically takes a half hour for them to get up to speed. They are better yet after being on for two hours. I have never turned off any other tube equipment other than when I am out-of-town or lightening threatens.
How should you treat your tubes?
I recently swithed from SS to all-tube amp and preamp. I usually listen to my stereo in long stretches throughout the day and evening but there are also intervals when I am not listening. My question: Do I turn off the amp and preamp during those intervals which may last as long as an hour or two hours? Or do I leave my system on during the day and evening and turn it off at night? Thanks for any suggestions. JNorth1178