2. amps-preamps
  3. 149214-112130

PRIMA LUNA DIALOGUE PREMIUM - 20 minutes and then loud pop and buzzing in 1 channel

Hopefully someone can help.

Amp is virtually new. The amp will operate wonderfully for 20 minutes and then a loud pop , and then buzzing from the right channel. I shut down the amp and then it repeats.  I switched some tubes and it is still there.  I switched the cables and know for sure it is only one channel, the right one. The buzzing does not increase with the volume increased. . 
It is the amp and not the Prima luna preamp.  Cables and connections are fine.   Pushing Focal Kanta No2's . 

Any help would be very much appreciated. I'd rather not send a 68 pound piece of equipment through the mail. 

Thanks lot - Craig 

128x128vespacraig1966
yogiboy's avatar
yogiboy
5,655 posts
 
Did you flip the switch for the correct type of tube that you swapped out? Triode-Ultralinear.

https://www.upscaleaudio.com/collections/primaluna/products/primaluna-dialogue-premium-hp-amplifier
rollintubes
84 posts
 
  @mickeyb
Sell it now. Seems everyone else is. You see how many are for sale?
Yeah, check out the prices. If you find a good one it's only $1000-$1500 below list. Most used equipment goes for 50% or less. The Dialogue Premium series has been superseded by their new EVO series of balanced amps, I notice that many have just gone up for sale. I'd sell mine at $1000 off so I could buy the new ones. That's a good deal for me!

Have you talked to the person who sold it to you? They may be of some help or stand behind their sale and assist in it's repair.

Rollin
jaybe
740 posts
 
Troll post. Why wouldn't the OP just contact the seller.
icanskate
36 posts
 
+1 Check the switch on the right side for tube type. FWIW my PL Dialogue Premium has been absolutely bullet proof for three years I’ve owned it..
best
k
tablejockey
3,886 posts
 
vespacraig65-

Since you've switched EVERY tube, then you may have eliminated the possiblilty

Call Upscale to get a referral for a shop to repair it
The suggestion of the switch on the right side will have nothing to do the problem. The amp will work fine in either position.


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