J’ai testé un ampli à lampes chinois… L'aiyima T9

Vacuum tubes powered the first radios, televisions… and even the first computers. Long before transistors and integrated circuits, all electronics relied on these glass bulbs capable of amplifying an electrical signal. In this video, we go back to the origins of this century-old technology: how vacuum tubes work, why they dominated electronics for over 50 years… and why they never completely disappeared. Because even today, you can find tube-based audio amplifiers. But how good are they really? Here, I'm testing a very affordable hybrid amplifier, the Aiyima T9: a small amp that combines tube preamps with modern amplification based on a Texas Instruments TPA3250 chip. On the program: • The invention of vacuum tubes by John Ambrose Fleming and Lee de Forest • Their role in radios, televisions, and early computers • A tour of a 1950s vacuum tube computer filmed at Aconit • The workings of a triode explained simply • Why vacuum tubes are still used in audio • Testing and teardown of the Aiyima T9 amplifier • And the big question: Is the sound of vacuum tubes really different? Between the history of electronics and the testing of a modern device, we explore why a technology over a century old continues to shine… literally. Buy this amplifier: (affiliate link): https://s.click.aliexpress.com/e/_c4N...