Hi all- I have a what looks to be older Mesa STR-415 - It has Green print and I also have one with Blue print. I am trying to date the mfg time period for these tubes-
Is anyone knowledgable on these tubes-
On the Green one the codes are
33
14
28
Made In USA
Again curious about when these tubes were Mfg.-
Is anyone knowledgable on these tubes-
On the Green one the codes are
33
14
28
Made In USA
Again curious about when these tubes were Mfg.-