A 'tube thing' would more likely be a static like noise and it would more likely appear in one channel (at least first). I would focus on a 'ground thing' and start disconnecting your sources, one at a time an see if it goes away. If not then disconnect your amp from your preamp and see what happens. Don't forget to turn off your amp when making these connections!
Audible Illusions Tube Pre-Amp Hum- Help Diagnosing
Began getting a low-level hum from the pre-amp which stays at the same low volume no matter where volume pots are set. Both channels are affected, although it seems to have begun in one channel (or maybe it had been more noticable in one channel, or maybe it was my imagination.)
Is this a tube thing, a ground thing, or some other issue?
Would like to narrow down possibilities before tearing apart the installation and/or buying tubes or other things unnecessarily.
Thanks in advance for any guidance.
Is this a tube thing, a ground thing, or some other issue?
Would like to narrow down possibilities before tearing apart the installation and/or buying tubes or other things unnecessarily.
Thanks in advance for any guidance.