In each case the tube was in the +/- tolerance range for satisfactory operating performance?
I wish I find the article I read years ago about "tube matching" by an engineer who determined it’s baloney-at least for audio equipment. Maybe a rocket ship to Mars it may be critical
Let’s be honest-who hears a 1ma MM reading? Perhaps it shows on test equipment, but your ears? .
That said, I still do everything in an owners manual.
I wish I find the article I read years ago about "tube matching" by an engineer who determined it’s baloney-at least for audio equipment. Maybe a rocket ship to Mars it may be critical
Let’s be honest-who hears a 1ma MM reading? Perhaps it shows on test equipment, but your ears? .
That said, I still do everything in an owners manual.