On 03/30/2016 09:46 PM, Hank wrote:

There were tons of texts written around 1920 that had some pretty
strange theories about what tubes did inside. As I recall, the first
really good text on radio circuits I encountered was Mary Texanna
Loomis's text from the late 20's. I learned EE basics from her text,
Ghirardi's "Radio Physics Course" from 1932, and Terman's 1937 "Radio
Engineering." One text that baffled me was Zworykin/Morton
"Television," which I got as a present at the end of WWII. No
wonder--the physics were much too advanced for me to understand.
Looking back some years later, I think the best text on vacuum tube
physics was Spangenberg's "Vacuum Tubes." It wasn't published until the
dawn of the transistor era, so never got the play that Terman and some
of the others did.

Hank





As I am reading more of de Forest's book I am now at the point where he
finally realized the highest vacuum possible was needed,