My old CD-1 has a buzz/hum in the right channel. It's not horrible, but it didn't always do this. I've isolated it to the CD player. Last time I had the CD1 open to swap tubes I noticed a bulging capacitor, and I wonder if it's related. I remember there used to be guys who updated these with new components, I wonder if anyone still does that? The board seems pretty simple compared to other electronics I've looked at, maybe it's not hard for anyone experienced in tube gear to fix? I doubt many people are still using these CD players, but any advice would be appreciated. I'd like to keep this one running.