Home Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

RE: Schematic shows 5U4 5V4

Thanks for advice. I have both 5U4 and 5V4, and 5V4 gives slightly higher B+. I have GZ34 to try as well.

Now at 405v plates, 1.20V at cathode, -32V at grid. Pretty close.
Adjusting bias, I can get the B+ to go up, but cathode voltage drops to around 1V.

Rough calculation of current: 1.21v / 26ohm (each side of 52ohm balance pot) = 46.5mA ?

Anyway, not worried about it much.

Edits: 06/14/17

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

Follow Ups Full Thread
Follow Ups


Post a Message!

Forgot Password?
Moniker (Username):
Password (Optional):
  Remember my Moniker & Password  (What's this?)    Eat Me
E-Mail (Optional):
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.