Back in December, the Hi-Fi Hobbyist podcast took a first look at the use of valves and transistors in Hi-Fi components. Valves or strictly thermionic valves are the British terms for what U.S. Hi-Fi Hobbyists call vacuum tubes. We will use the term “valve” throughout these podcast episodes.

In this series of episodes, we will take the chance to take a deeper more detailed look at the topic. In this first episode we will look at the underlying scientific theory, and the theoretical implications for sound quality.

In the next we will start by looking at reviews of real-world amplifiers and then consider why the reality is more complex than the basic science might suggest.

In the final episode, we will feed the data to two AI protagonists and let them debate the merits of valves and transistors.

In this first episode, the music accompanying the podcast is Big Band swing music created by the Hi-Fi Hobbyist with the help of Mureka AI to evoke the era when valve amplifiers were the only technology available.

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