|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
|
|
Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
|
In Reply to: Mark, thank you; you and BBECK have me straightened... posted by radiance on July 3, 2006 at 23:46:06:
The cube root thing comes from the Child Langmuir equation. Child Langmuir states that current is proportional to the 3/2 power of the effective plate to cathode voltage. That means the plate to cathode voltage varies as the 2/3 power of the current (by inversion).Since plate resistance is the rate of change of plate to cathode voltage with a change in current, it is the first derivative of the 2/3 power which is -1/3 or the inverse cube root. You may need to review differential calculus to see where that relationship comes from.
Mark Kelly
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- Cube root - Mark Kelly 15:21:33 07/04/06 (0)
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2025, Audio Asylum, all rights reserved ]
