Microphonic from Vacuum Tubes?


HI,  I have a question regarding microphonic from vacuum tube.  I have a Cary SLP-05, and I've changed the output gain tubes to some NOS RCA, and also recently purchased a pair of Linlai for the balanced buffer stage.

I now occasionally hear a loud pop in the music.   It doesn't happen very often, but when it does, it is quite loud.   This happens when I am streaming digital music, so it can't be those occasional pops you hear from vinyl.  

Can someone tell me if this loud pop possibly caused by microphonic in my tubes?  if so, how do I track down which tubes?   My guess there is no easy way but change one tube at a a time, which can be extremely time consuming.   Also I don't own a tube tester.  I wonder that would help tracking it down.

Also I read something about vacuum tube damper rings,  would that help calming down possible microphonic?

I still  consider myself a newbie in tubes,  so any hep will be appreciated.  Thanks very much.

128x128xcool

When doubt contact customer service! Thats why they have a contact number: I don't know why people consult a forum when every reputable manufacture has a support number & its free & you won't waste money on random ideas that may make your issue worse. If its known issue, you will have your answer quick: If not, they can guide you to the cause or where to seek help.

@jb1  , OP isn't sure which component in his system is causing the anomaly, and since they are all from different manufacturers. . . .

Also, I own Cary products and I like them very much, but do you know what now happens when you call Cary up for tech support?  Unlike in the good old days of Cary Audio Design they now tell you to send them an email.  My experience has been they are not always super prompt with a response.

I think the trickiest thing about this issue is that it happens so infrequently, and I can’t reproduce the problem. So diagnosing will take a long while. That’s why my obvious focus is the latest change that I make to my system.

I have never come across anything similar to this issue ever for as long as I’ve been listening to music on any of my equipments that I ever owned. I was hoping someone in this forum had experienced similar issue and offer a quick way to diagnose and track down the culprit, but I guess there is no easy way to tackle this.

Thanks for everyone’s comment so far. I will definitely update you guys if I find and fix the issue!

I have had unlistenable crackling and pops from streaming a bad file. It would be nice if you used a different source to see if it occurs without streaming.

@acman3   +1

I have had unlistenable crackling and pops from streaming a bad file. It would be nice if you used a different source to see if it occurs without streaming.