Hi all - it's been nearly 10 years since my last post and in that time my amp has been the center of my listening enjoyment and has presented virtually no issues until recently. A few weeks ago I started to notice my left channel was sounding intermittently scratchy and static-y. I first rolled my output tubes and then the driver & splitter tubes to see if the issue moved to the right channel. No changes there. Next I deox'd my volume potentiometer since that had been noisy at times. That seemed to clear it up or at least make the scratchy less persistent. I have noticed that the scratchy output was audible after turning the amp on but then would dissipate after a few seconds. It almost sounds like someone is crumpling up a piece of paper after I turn on the amp but only in the left channel. All of that would be marginally tolerable if I didn't now notice the output level is roughly 30% less than the right channel. I've confirmed the input source is not the culprit and the audio signal isn't affected other than being considerably lower in amplitude.
The output bias voltages are all within the appropriate range so I'm curious where else I should look or consider given the reduced output? Do folks have experience troubleshooting a similar issue and would you expect it to be a failing capacitor or otherwise? The fact that there's no buzzing or humming leads me to believe it's not a cap. But before I start exploring on my own I thought I'd ask for any guidance.
Thanks in advance!
Kind regards,
Chris
The output bias voltages are all within the appropriate range so I'm curious where else I should look or consider given the reduced output? Do folks have experience troubleshooting a similar issue and would you expect it to be a failing capacitor or otherwise? The fact that there's no buzzing or humming leads me to believe it's not a cap. But before I start exploring on my own I thought I'd ask for any guidance.
Thanks in advance!
Kind regards,
Chris
