Figure 1 shows a variation on a sine wave oscillator, it uses just two transistors and a single variable resistor to set the frequency. Figure 1 Just a couple of components are needed for a simple ...

Then, we’ll pass the audio out through a lowpass filter ... you can simply tune the Twin T up and use the circuit as a sine wave oscillator. For a single set of capacitors it’s not very ...

But the design goals are pretty clear: build an oscillator with as little distortion as possible across the audio frequency ... in a Heathkit IG-18 sine/square wave generator, a defunct instrument ...