Uploaded January 2023 | Updated September 2026, 19 minutes ago

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Tube amplifiers are renown for their lush sound, but audio output tube development took a long road to achieve that accolade. Joe Knight tells the story of audio output tubes, from the fractional watt tubes of the 1920s to the legendary EL34 and 6550 in this presentation at the Antique Wireless Association 2022 Conference.

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