Yeah. Except I know it as the "phase-shift oscillator". The phase shift doesn't need to be the same at each stage, the oscillator will find the frequency where the combined phase shift totals 180 and go happily on its way.Anyone remember the 60° oscillator?
How messy it would be to work with those tubes..These lil opamps chips are the best and cute tooBest I can remember, I learned of the "Phase shift oscillator" in the fall of 1972! (Don't tell anybody ). Then, they taught both the tube and the semiconductor versions of circuits.
You know, I actually HAD one of those, years ago! I sold it at a ham flea marker. Just hope it found a good home.What would be really impressive would be to reproduce the Hewlett Packard historic (HP-200A) using FETs and solid state approach to the large variable cap. If my memory is correct, each section of a ganged cap (like the one shown in the photo) were about 365pF max.
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