
Lt. Bob
Spread the Daf!
that's actually much less of an issue than many make it out to be. First off , few of you guys put enough time on the amps to ever need to change the pre amp tubes. I gig almost nightly and I might look at my pre amp tubes after 7 or 8 years and very few of ya'll put that many hours on your tubes.On the other hand, you have amps. .................... Tubes need replacing.
Power tubes ...... on an amp that I gig with say 250 times a year I'll change power tubes maybe in 2 or 3 years. That's around 1000 hours of kicking.
But over in here in Florida I use so many different amps that none of them get more than maybe 50 gigs in a year ...... 200 hours ..... so maybe in 10 years I'll start thinking about it!

I doubt very seriously any of you put 1000 hours a year on your amps so really your power tubes outta be good for 10 years and your preamp tubes forever.