af_oscillator

AF_Oscillator

Handy tool for signal tracing, and for generally making noise.

I built this Audio Oscillator many years ago, and even wrote an article about it for 73 Magazine.

The oscillator part is a Wein-Bridge configuration with a dual pot for the variable Resistance, a 2P6T switch and capacitors for range switching, and a #37 lamp for the feedback regulator.

The other half of this 5558 dual op-amp takes it's input from an output level pot and is wired as a unity gain device for driving the output.

No, I do not still have a copy of the schematic, but the design is commonly available in older ham radio magazines.