More Changes for the LM386 Wien Bridge Audio Oscillator

Continued the LM386 Wien Audio Oscillator project by making some changes. First, changed the feedback resistance in series with the diode pair from 16k ohms (had wrongly ID'd before as 15k ohms) to 27k ohms. This improved the waveform under heavier output loading. Next, tried larger output caps, started with 470 uF but then went with 1000 uF. This made a huge difference with a speaker connected directly to the LM386 output (through the 1000 uF cap). Finally, added a 10 ohm, 2 watt carbon comp resistor as the load. The resistor actually gets warm to the touch after a period of tone.

Here are three scope caps of the low, mid and high frequency output.