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Amplifier Goes into Protect Mode Right Channel

Wanted to hear your tech thoughts on this problem. After spinning vinyl for 1-3 hours, the right channel on my solid state amplifier goes into protect mode. This repeats itself multiple times each session. I have a tube preamp and tube phono stage. Only one source - turntable. I've swapped tubes in the linestage preamp which made no difference; swapped IC cables which made no difference. The linestage tube preamp is new (one month old) but I'm beginning to think it may be a leaking cap causing the trouble. Also looking at the speaker cables as a possibility. Would that matter? Any thoughts? At the point where I'm ready to RMA the preamp for bench test. Thanks in advance.
wescoman

Showing 2 responses by swampwalker

swampwalker's avatar
swampwalker
5,138 posts
 
Why do you think it's the preamp and not the amp?
swampwalker's avatar
swampwalker
5,138 posts
 
Same amp, same channel again???? W two different phono stages and two different line stages??? I'd be thinking its something w the amp that only happens after it warms up, and that when you sent the amp back, the tech did not let it run for a long period of time. I'd try swapping speaker cables, then the various interconnects, and work my backwards to isolate the component. It'll be a long haul if it takes 1-3 hours each time to get it to go into protect mode, but that seems to be the only certain way.
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