Thermionic Emission and the Edison Effect - Teltron Planar Diode Tube - F-J's Physics - Video 146

Using the large glass Teltron planar diode to demonstrate thermionic emission and the Edison Effect. More proof that electrons are negative. Please consider supporting my work by buying me a coffee at https://www.buymeacoffee.com/francisj... Helps me buy bits and pieces to make these videos! Very many thanks, F-J