Installed new tubes. Now a loud pop!

I put new old stock tubes in my PS Audio amps & pre & now a loud pop off & on.

Help!

fertguy02-25-2025 9:14pm

fertguy OP Details Discussions Posts This discussion Message User 313 posts 02-27-2025 at 03:09am Copy Comment URL Report Comment Edit Delete Ok, burned. I'm from Missouri, lol
carlsbad2 Details Discussions Posts This discussion Message User 2,023 posts 02-27-2025 at 01:00pm Copy Comment URL Report Comment Edit Delete I’m from MO too. are you talking about a black spot on the inside? I wasn't quibbling with your word choice, just wanted more details. thanks.
fertguy OP Details Discussions Posts This discussion Message User 313 posts 02-27-2025 at 02:44pm Copy Comment URL Report Comment Edit Delete Yes, a flakey looking spot.
fertguy OP Details Discussions Posts This discussion Message User 313 posts 02-27-2025 at 02:45pm Copy Comment URL Report Comment Edit Delete I should have better inspected.