AusTex64
Well-known member
- Joined
- Jun 3, 2013
- Messages
- 525
I have three Telefunken tubes purchased for some mic builds that are all very noisy. Which really surprises me, I've never had this happen with Telefunken tubes before. I have another Telefunken tube of the same type that is quiet and sound great in my builds, so I know it's not the mics. I suspected that first, so checked tube socket tension, cleaned all components, cleaned tube pins, etc. The noise follows the tubes.
So, is there any procedure for burning in these tubes to eliminate the noise? Or do I just pitch them and get more? Just seems odd that all 3 have this problem. Unfortunately I've rubbed the date code off the tubes by handling them, but I'm guessing they are quite old based on the packaging.
So, is there any procedure for burning in these tubes to eliminate the noise? Or do I just pitch them and get more? Just seems odd that all 3 have this problem. Unfortunately I've rubbed the date code off the tubes by handling them, but I'm guessing they are quite old based on the packaging.