Thanks for your feedback. I will try swapping tubes and let you know the results.
Lower volume from right channel
About a week ago while playing my custom-made push-pull EL34 amp I noticed a sudden spark coming from the bottom of the amp toward the back. I immediately turned the amp off. A few minutes later I bravely turned the amp back on and surprisingly it continued to play music. However, I've noticed the balance has been off since experiencing this. The left channel appears louder, with greater presence. Can anyone diagnose what the problem could possibly be before I have a tech look at it. Thanks for your feedback!