• “Tubes 201” How Vacuum Tubes Really Work
  Online article explaining the physical and electrical operation of vacuum tubes. Contains some mathematical equations, but they are only supplemental.
  in electronics with tube_amps by 2 users
• articles [Milbert - tube amps for cars]
  in electronics with car_audio tube_amps
• Fun With Tubes
  Great resource with lots of simple theory, pratical considerations, and project information. Categories include "The Basic Stuff", "Construction Projects", "Radio", "Audio Amplifiers - How They Work", and "Building Amplifiers".
  in electronics with tube_amps

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