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EAST Knowledge - Going Back in Time for Some Vintage Howdunit

Gresham Library Meeting Room
385 NW Miller Ave
Gresham, OR 97030, US (map)
Public WiFi

385 NW Miller Ave, Gresham, Oregon



EAST Knowledge invites you to attend our sixth meeting! All are welcome!

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

Bill Howland will re-introduce us to vacuum tubes and their uses. He 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.

Come and learn something old!

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!

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