Sorry, just reread my post, and realized it didn't make sense.
The longer I leave the amp on, the more the tubes glow the same brightness...
it's just this one 6SN7 that isn't glowing as brightly. The 300bs start off at different glowing brightnesses, and then become more alike as the amp stays powered on...
It's a VAC 70/70, and it is self biasing...
The longer I leave the amp on, the more the tubes glow the same brightness...
it's just this one 6SN7 that isn't glowing as brightly. The 300bs start off at different glowing brightnesses, and then become more alike as the amp stays powered on...
It's a VAC 70/70, and it is self biasing...