Primaluna signal tube replacement

Hey thanks for that.  I swapped speaker cables and the scratchy moved with it.  My spares were Primaluna and the noise vanished.  So,, replace my spares now.  Voodoo

"My spares were Primaluna and the noise vanished"

Sometimes, merely re seating the tube in the socket cures

noise. The suspect tube may still be good.

I own a PL DiaLogue Premium Integrated that's about 7 years old. It's in daily use  2 to 4 hours per day.  Several months ago the a couple of the 12au7 tubes became noisy, and I decided to replace all six (6) of them.  I went with General Electric JAN stock from Upscale Audio - and opted for premium grade a/k/a "Kevin's Stash."  They've been wonderful - dead quiet. Not cheap but well worth the money, as far as I'm concerned.  

https://upscaleaudio.com/products/ge-12au7-6189w

I bought some of “Kevin’s stash” tubes for my Mac preamp mc phono stage.  They are so quiet, it’s scary. Well worth the money. 

Primaluna’s stock tubes in the outer positions are fine. I have been running vintage Amperex "Bugle Boys" in the gain positions with great results. On the power amp I run A-matched EL-34's from Sophia Electric - also outstanding.