If there’s one thing that amateur radio operators are passionate about, it’s the search for the perfect sine wave. Oscillators without any harmonics are an important part of spectrum hygiene, and while building a perfect oscillator with no distortion is a practical impossibility, this twin-tee audio frequency oscillator gets pretty close.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/02/18/no-inductors-needed-for-this-simple-clean-twin-tee-oscillator/