Heathkit HD 1416 Code Practice Oscillator.
I take a trip down memory lane, engage in a bit of nostalgia, and scratch-build an old CPO. Video was recorded almost three years ago now.The circuit description is a little oversimplified (not by much) and the circuit animations are also a little oversimplified (and a touch out of sync with the audio) but I wanted this off of my hard drive after almost three years.
