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Loud Popping When Preamp Tubes are Touched

Hello,

On my integrated tube amp (Jolida), I noticed that unless the preamp tubes (12AX/T7) are physically moved, just slightly, I get loud (full output?) popping/rushing. If I just nudge the preamp tube (seems to just be one) backward a little bit, it stops, and all sounds good. I'm assuming that after running for a bit, and shutting down, the cooling of the tube causes it to move in the socket. So (usually) the next time I power-on the amp, I get that Popping. Nudge the tube, all good.

Any idea what this could be? I have never cleaned the sockets. I have tried other 12A*7's, and the result is the same, so the problem follows the amp.

Thanks!

-Brian

brian_stabinger

Showing 1 response by brian_stabinger

brian_stabinger OP
19 posts
 
Thanks for the reply! 

I do have some pliers, as you describe. I'll get in there and try tightening the socket sleeves. I've taken it (somewhat) apart, once (volume knob and input switch replacement), and it is a pain to disassemble. Hopefully that works! 


"...the cause... as well as the cure." 

Very aptly put.
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