Home Tube DIY Asylum

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

RE: Something I don't Understand...

The inside of the cathode sleeve is NOT coated, and is a poor emitter. But either electrode will still emit enough electrons to the other positive electrode.

Because the emission is poor, this thermionic diode is easily saturated. At typically 30v or more difference either way, the leakage current is saturated and does not vary with the heater instantaneous voltage - the voltage fluctuations can't cause a hum because the current does not fluctuate.

Of course there is still capacitive coupling between the electrodes ...


This post is made possible by the generous support of people like you and our sponsors:
  Signature Sound   [ Signature Sound Lounge ]


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.