Sunday, October 11, 2015

Going Back in Time for Some Vintage Howdunit (Meeting #6 Announcement)

Update: A meeting recap.

EAST Knowledge is excited to announce it's sixth meeting. Bill Howland will re-introduce us to vacuum tubes and their uses. Come and learn something old!

What:Going Back in Time for Some Vintage Howdunit
Who:Bill Howland
Where:The Meeting Room at the Gresham Library
385 NW Miller Ave, Gresham (map)
When:10:30am - Noon, Saturday, October 24th, 2015
Why:Sharing what we know

Bill Howland will:

  • Give a summary of the origins of vacuum and gas diodes and related thermionic devices
  • Have show-n-tell demonstrations of the earliest and simplest of such devices: The diode

Vacuum tube diodes were put to use in the early days of radio as "detectors", because they were more robust and reliable than crystal, mechanical, and chemical contrivances used for this purpose. With further development, thermionic vacuum and gas diodes advanced to be capable of power rectification with ever greater efficiencies.

Many example devices from the 1930's to 1950's will be available to examine. There will be orange, purple, and blue glows in the demonstrations!

Come and share what you know or just come to learn what other people know! All are welcome!

Bill shares some of his projects on his blog: Evil Science Audio