Sounds like you have a bad tube already....If you still have your old tubes ( as back up ) take your new tubes out and put back in the old..I bet the problem goes away.................Not that unusual to get a bad new tube...I recently purchased a beautiful pair of Tungsram 12ax7 only to find out after 30 minutes one tube was bad........Had to send them back for a refund..................If you have a good tube supplier he should help you out with a replacement set...Good luck..
Popping from tube integrated amp
I've owned an Eastern Electric M520 for about 3 years and have it connected to Omega Hemptones. I changed the EL34 tubes about three months ago from the stock Chinese tubes to NOS Mullards.
This afternoon about a minute after powering up the amp, very loud popping noise came through the speakers - - the popping was constant - about 90 to 100 pops per minute I would guess. The volume was at a (loud) constant level, regardless of where I set the volume control. The popping continued without regard to which input I selected.
After turning off the amp, I reseated the tubes and tried again - - same popping. The tubes all look normal - - no unusual visual cues.
Anyone have any idea what the problem is likely to be? Many thanks for any suggestions.
This afternoon about a minute after powering up the amp, very loud popping noise came through the speakers - - the popping was constant - about 90 to 100 pops per minute I would guess. The volume was at a (loud) constant level, regardless of where I set the volume control. The popping continued without regard to which input I selected.
After turning off the amp, I reseated the tubes and tried again - - same popping. The tubes all look normal - - no unusual visual cues.
Anyone have any idea what the problem is likely to be? Many thanks for any suggestions.