Home Tubes Asylum

Questions about tubes and gear that glows. FAQ

RE: Tell me if this makes any sense?

As Eli pointed out, this is due to increased cathode activity. It is common to get tube from them with less than full cathode emission. I just got some of the new Tung-Sol 6EU7s in and about 50% of them had low cathode current (meaning less cathode activity than "normal").

That's why I run in all the small signal tubes before testing/matching. I choose not to reveal my method, but I run the tubes until cathode currents are up to normal. I test/match them then, otherwise after break-in they're way off.


This post is made possible by the generous support of people like you and our sponsors:
  Crux Audio  


Follow Ups Full Thread
Follow Ups
  • RE: Tell me if this makes any sense? - Jim McShane 08:11:40 08/23/14 (0)

FAQ

Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
Subject:
Message:   (Posts are subject to Content Rules)
Optional Link URL:
Optional Link Title:
Optional Image URL:
Upload Image:
E-mail Replies:  Automagically notify you when someone responds.