Title
The Vacuum Tube
Description
Audio recording of a lecture given by tutor emeritus Howard Fisher on April 15, 2026 as part of the Dean's Lecture & Concert Series. The Dean's Office has provided this description of the event: "A puzzling phenomenon observed by Edison in one of his early light bulbs seemed to disclose a kind of electric current that did not fit the received ideas, for it was not confined to a conductor, and it would flow in one direction but not in the reverse direction. From this 'Edison effect' arose the modern vacuum tube, which enabled, first, the detection of electromagnetic waves by a process readily understood (rectification), and second, a means for effectively multiplying the strength of an electric current (amplification). Both of these capabilities brought dramatic improvements in wireless telegraphy, and they also introduced the prospect of radio transmission of voice and sound. This is the second of three talks on early radio technology."
Creator
Publisher
Coverage
Santa Fe, NM
Date
2026-04-15
Rights
Meem Library has been given permission to make this item available online.
Type
sound
Format
mp3
Subject
Relation
Language
English
Identifier
SF_FisherH_The_Vacuum_Tube_audio_2026-04-15
Original Format
mp3
Duration
00:57:20