Home Tube DIY Asylum

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

RE: confused again

It will be a lot less confusing if you have a coupling cap. The grid of the output tube will be at 0V DC, then you can bias up the cathode accordingly.

Direct coupling means that you are relying on the plate voltage of the driver stage to be predictable so that the output stage operates properly. This isn't always the easiest thing to do. You're also going to run the same output tube current through a much higher value biasing resistor, so heat will become quite an issue.

You also don't seem to have enough B+ to properly run a directly coupled circuit, at least with what you've been discussing.


This post is made possible by the generous support of people like you and our sponsors:
  K&K Audio / Lundahl Transformers   [ K&K Audio / Lundahl Transformers Forum ]


Follow Ups Full Thread
Follow Ups

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.