I think I solved the popping problem inadvertently without changing a capacitor. I simply took out the VV52B output tube and firmly reinserted it. Popping was gone upon next start-up. What is this a sign of? A defect with the tube contacts? I think another audiogon member said that he fixed a sputtering problem on a Jadis push-pull amp by pushing down on the output tube while it was in operation. Why does this work?
Help: Tube Amps Pops Speaker Cone
One of my single-ended triode monoblocks makes a loud popping sound in my speaker shortly after turning it on. There is an LED on the amp to indicate the proper waiting time for the internal tension of the amp to be adequate for functioning. After this LED goes on (to indicate it is ready) the amp then initiates a sequence of pops of decreasing volume in the speaker for a few minutes. There is also a hum present that largely disappears when music is played over the speakers. What is the problem with my amp? What can I do to stop this popping? I am afraid of damaging my speakers.