How often do you send your tube pream/amp to the manufacturer for service and calibration?

Assuming everything sounds fine. Or you don't do it if everything seems fine ?

inna03-01-2025 9:31pm

immatthewj Details Discussions Posts This discussion Message User 2,493 posts 03-01-2025 at 09:52pm Copy Comment URL Report Comment Edit Delete Never.
carlsbad2 Details Discussions Posts This discussion Message User 1,958 posts 03-01-2025 at 10:26pm Copy Comment URL Report Comment Edit Delete Never. And if there is a problem, the OEM is my last choice. I have very few problems, but most I fix myself. I got confused about the interchangeability between an EL84 and a russian tube and I blew a resistor in an amp. fixed it myself in 15 minutes. Jerry
willywonka Details Discussions Posts This discussion Message User 291 posts 03-01-2025 at 10:34pm Copy Comment URL Report Comment Edit Delete It's not test equipment and doesn't need calibration. I would send it in only if it was broken.
inna OP Details Discussions Posts This discussion Message User 7,566 posts 03-01-2025 at 10:46pm Copy Comment URL Report Comment Edit Delete Yeah, amps are not tape decks, still I thought it might not hurt to do it every five/seven years or so.
ghdprentice Details Discussions Posts This discussion Message User 7,360 posts 03-02-2025 at 01:28am Copy Comment URL Report Comment Edit Delete I would probably do it at twenty years... but with the exception of my first great preamp... an Audio Research SP4 (?... not tube... but that would not change my behavior) I’ve never had one more than about ten years.