2. amps-preamps
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PrimaLuna tube amp issue

Aloha,

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.

Michael 

sparkymaui
sns
3,003 posts
 

Yep, tube failure just after shipping, not unusual, and can happen with all tubes and equipment! This actually happened to my PL Dialogue Four, one EL34 power tube failed on first firing, took out one resistor on auto bias board, I did diy repair.

tablejockey
3,772 posts
 

I have a PL HP, and had a channel go out.

Each channel has an auto bias board- could be the problem.

Time to send it to a PL authorized repair facility. Just any repair facility won't do-they will not be ablt to get the schematic. Call Call Upscale for reference.

stereo5's avatar
stereo5
6,251 posts
 

Did you reach out to the person you bought the amp from?  Does it have any known issues?

bigkidz
3,312 posts
 

Either send it in for a repair or find a local tech  does not sound like a major issue

 

 

sparkymaui OP
13 posts
 

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...

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