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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!
a_passion
yogiboy's avatar
yogiboy
5,805 posts
 
Swap the tubes and see if the right channel is louder. If so then it is a bad tube!
mofimadness's avatar
mofimadness
5,263 posts
 
I agree with yogiboy.  Since it's a custom made amp, the designer might be using a fuse or resistor that might have popped when the spark hit.  If so, that would need to be replaced.  Normally if something like that happens, the amp wouldn't work on that channel, but it would depend on the topology of the amp design and how it's implemented.
a_passion OP
20 posts
 
Thanks for your feedback. I will try swapping tubes and let you know the results.
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