How can you tell when tubes are shot?


I have an ARC REF1 and ARC REF Phono Preamp as well as assorted solid state gear. I leave everything on 24/7 and am wondering if the tubes just quit working (ie: get really noisy) or whether there is a gradual decline in their performance? ARC makes recommendations on who long they should last but I have been running the REF1 steady for over 18 months and haven't noticed anything.
ntscdan

Showing 1 response by brauser

I think there's allot of good advice on the previous posts.
I might add that turning the epuipment on/off really is not a problem with the newer design ARC epuipment. I got tired of replacing tubes so I just plan out listening time to turn
everything on about an hour before. Keeping the system on also creates one other gremlin and that is that resisters/capacitors begin to dry out over a long period of
sustained use which presents degradations apart from the
tube issue alone. I tend to buy the highest quality I can
afford and then keep/tweek for along time. As such, I believe it's best to turn the epuipment on/off if there are
sustained periods of non-use.