2. amps-preamps
  3. 1021826495

Noise From New Tubes

I have just installed a pair of RadioTechnique 12AU7's in my CJ PV10A and am experiencing "static" type noise. I removed them and used a can of compressed air to remove any dust, debris, etc, but the noise is still there (although much less so). Might these tubes be "bad"? Are there any other tricks I can try to clear up the noise? Could there be a problem with the "sockets" in my pre-amp???

Thanks!!!

Brad Day
Atlanta, GA
bday0000
bday0000 OP
266 posts
 
Thanks, Clueless and Lak. But Clueless, would you please translate or explain some of that for me???
pops
2,278 posts
 
Try switching the tubes in the sockets, this has worked for me in the past - the pv10 is a little noisy anyway but not excessively so...
bob_bundus
1,834 posts
 
Brad since dusting was beneficial, you might benefit further by actually cleaning those contacts (both the tubes & sockets) with pipe cleaner(s) dipped in Kontact or Audioquest Ultraconnect.
Regarding Clueless's dissertation: I think he needs to update his handle because he's obviously anything but... However, unless you're highly electronics saavy then that advice isn't gonna help you too awfully much, good as the information might be. Before I'd go to all of that trouble I'd just try a different component (but then that's just me).
One other component tweak that helps with thermal noise reduction is installing an upgrade AC cord; chosen first of course for improved sonic signature, the noise reduction being an added benefit. AC line conditioning & even a dedicated AC line can also help.
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