A small bit of Radio History, Lee De Forest Audion, Marconi

Lee De Forest Audion Marconi Triode vacuum tube

Category:

Science & Technology

Tags:

• Radio
• History
• Lee
• De
• Forest
• Audion
• Marconi
• Triode
• vacuum
• tube

[wa1ufo]

Beautiful tube-a work of art but solid state was the first radio technology and we have returned to it.73s!

[AllAmericanFiveRadio]

@wa1ufo

I wish I would taken a picture of an all original, very early crystal set, Ed Bell had. It was large and had it's original Glass Cover.

[sparkyct55]

Thanks for showing me this. My Grandfather was Lee deForest and I never really paid much attention to his work when I was a child. He died when I was 13

[AllAmericanFiveRadio]

Your Grandfather's invention, the Triode Vacuum Tube, was the start of all electronics. An amazing position to hold in world history, it literally changed the world. And I still find the function of the Triode Tube fascinating. Thanks.

[nlimchua]

@AllAmericanFiveRadio With all due respect to Mr. DeForest, although he came up with the idea of the audion, he never seemed to fully understand the principles behind it and its inner workings. History will show that it was the man who would eventually become his nemesis (and inverntor of FM and superheterodyne), Prof. Edwin H. Armstrong who would eventually write the papers that would detail everything needed to know about the audion.

[AllAmericanFiveRadio]

@nlimchua

Empire of the Air, Excellent book. And the documentary by Ken Burns based on this book is the best radio history ever made.

[tomlynntigard]

@wa1ufo, Look at 2:40 the small print says "Trademark Fleming valve..." Recognition where recognition was due. Without the Fleming Valve the third element never would have been inserted to allow amplification. Both were geniuses, who perhaps couldn't explain technically what was happening, but geniuses just the same.

[douro20]

The first widely used audio tube was the French "R" valve. It is still being manufactured by KR in the Czech Republic.

[AllAmericanFiveRadio]

No the filament is open but it would not look any different if it was good. Hope to find a working one some day.

[mistertentpole]

So... does it still work? That would really be interesting.. Built to last? :) thanks for sharing.