Have you changed the tubes around ?
PrimaLuna tube amp issue
I just received by mail a used PrimaLuna Dialogue Premium HO Integrated amp. I hooked it up and it sounded great but after about 45 minutes of listening, the right channel disappeared after a quiet pop. I have swapped out speaker wires, cables...no effect. No bad tube lights come on. Left channel plays fine. Headphone only has left channel as well. It was running a little hot, but not excessively so. Any thoughts...
Bummer way to start with a new/used piece of equipment....sigh.
Thanks for your help in advance.
Ah, the joys of ownership of tube gear with high internal voltages! I assume that the main circuit fuse isn't blown as you still have a working channel. Unplug the amp and let sit overnight. Then remove the bottom cover and take a look inside. Look for a blown cap with stuff coming out of one end. Could be a blown coupling cap. If so replacing it may not solve the problem! I wish all tube gear manufacturers would provide schematics to make troubleshooting easier!
All tubes including signal tubes? or Just the power tubes?
Are the valves lighting up? If they are not lighting up, that's one thing. If they are I'd be looking to the small valves.
Speaker wire swap to check for speakers.
RCA/XLR swap to check for cables and source.
Not a fuse in the speaker?
Not a fuse per channel?
Side Note: It was shipped to your Island.
Just thinkin' out loud.
Hello all, thanks for all the feedback. I reached out to previous owner and he suggested, as a number of you have, to touch base with upscale audio. I have made contact and they are walking me through a series of steps via email to close in on the problem. At this point, we are at the thorough check of tube point and will likely progress from there. If all these tests fail, I suspect he may have me take a look inside to see if there is any obvious damage.
If anything significant pops up may return to this tread. Thanks again...
That is a heavy well built amp. I owned one.
The sound you describe hearing right before the issue in the one channel happened was a soft pop, which is making me curious to hear what Upscale says. I had a couple of small issues like this and they were fantastic. The problems were solved with no stress on me.
Keep us posted as to what unfolds.