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Weird Popping issue

Hey all,

I have a primaluna stereo amp and have been having some issues with it lately and was hoping to get some advice on what action to take next to try and resolve the issue. 

Each time I turn on the amp, the amp warms up, the audio signal comes through, and then maybe a minute after it has warmed up and started the audio, i hear a couple loud popping sounds from the right channel and then i lose all sound from that speaker. The audio keeps coming through the left and the sub however. The only way to remedy the situation is if you turn off the amp again, wait a little, power the amp back on and then i don't have any issues with either channel. 

pretty new to tube amps but haven't had any problems with my gear before this.

any help that you could provide would be more than appreciated. 

let me know if there is more info i can provide to help you understand my situation. 

Thanks a lot. 
baf5289

Showing 3 responses by atmasphere

atmasphere's avatar
atmasphere
12,110 posts
 
The chances that this is a bad tube are pretty high. My guess is it will be one of the smaller tubes- not one of the power tubes.

The tube is likely developing a cathode/filament short or similar. Quite often the short will heal temporarily if the tube is cycled off and then on again.
atmasphere's avatar
atmasphere
12,110 posts
 
If you have a Primaluna I would start with Kevin at Upscale Audio.

You might also look on ebay- that can be a good source if you know what you are looking for.

Also try CE Distrubution in Arizona.

Of course, a lot depends on what tube type it is and how much you are willing to spend!
atmasphere's avatar
atmasphere
12,110 posts
 
It does sound like a power tube; a power tube failure would reduce output, but not kill it entirely.

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