In Reply to: 6E5P posted by Maxamillion on December 26, 2016 at 15:52:25:
That's different tube, all right!
I noticed the high transconductance (30,500 microMhos!), so oscillation is still a candidate. There is no grid stopper shown for the 6E5P, which makes oscillation very probable.
This post is made possible by the generous support of people like you and our sponsors: