One major win was locating the original J-FET Tek used in the oscillator’s AGC circuit. One part that’s proven more elusive is the potentiometer that Tek used to adjust the frequency ...

To be honest, I can’t actually remember which circuit went into the equipment, but his Wein oscillator was a lovely thing. I have just discovered that Apex Microtechnology of Arizona actually makes a ...

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 ...

Whether this timeless effect comes from an amp or a pedal, the sound of this O.G. guitar effect still has us shaking all over ...