deluxe reverb reissue fading out

[Dave518]

I was recently playing with some different tubes in the deluxe. 5751,4024,12ya7,etc. One of the original 12ax7 groove tubes was bad. I had the amp sounding great. Day two with new tube after 3-4 hours of playing the amp just faded out. I cycled the power the amp worked again. Next day with in an hour same problem. I've since changed out all the tubes including power tubes, same problem. The amp sound great and after awhile it will just fade out. I've had the amp for a couple years but have not played it at all until recently. Any advise out there.

[Enzo]

Yeah, when it fades out, look at the tubes and see which ones are no longer sporting a glowing heater inside.