In Reply to: RE: NOS AS7s in MA-1s? posted by ACHiPo on July 28, 2021 at 15:59:04:
A silver sharpie would work fine if you want to number the tubes and maintain some kind of log. I put little pieces of masking tape on the tube bases to write numbers on, but was careful to put them on the "back" side so I don't have to see them as my OCD side would not like that! I did recently find that I had about five dead tubes in one monoblock and never knew it by listening, so I wouldn't stress too much about matching. I just went through the effort out of principle (and because I had access to a tube tester). I understand one way to know if something off is to simply check the dc offset and bias. If the previously set values are off, then likely there is a weak or dead tube to blame. As acres verde also mentioned, whenever there is a problem, it is ALWAYS a tube issue.
voolston - audiophile by day, music lover by night!
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Follow Ups
- RE: NOS AS7s in MA-1s? - voolston 06:57:20 07/29/21 (0)