Intermittent “Static sound” on Left Channel

[roycruz23]

Hi! I am experiencing intermittent “static sound” (like popping sound of a dirty record/vinyl).
The sound is not really that bad when playing on my preferred level.

[Paul Joppa]

One channel, or both? If it's one channel, swap the tubes to see if it follows the tube.

[2wo]

You might need to clean the tube pins. Or just try removing and inserting them a few tims...John

[roycruz23]

I tried to switch tubes but it is still there on left channel.
The static sound starts 3-5 minutes after switching on the amp.
It goes up when I turn up the volume but is not affected by
turning the balance pot L or R.

[Paul Birkeland]

This could easily just be a flaky solder joint or loose connection in your Moreplay.

[roycruz23]

I think I found the “cold solder”. I reflowed it and now static is gone so far.
It was at the A4 socket terminal. Thank you people!