Soft Clipping in LM386 circuit.

Started by idsnowdog, April 13, 2025, 04:36:15 PM

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idsnowdog

I bought an LM386 today and I saw the schematic for the ROG Big Daddy which I would like to build.  I haven't built anything with op-amps before.  I have seen soft clipping circuits in other TL072 based dual op-amp circuits and it looks like they go between pins 1/2 or 6/7.  But I haven't seen it with the LM386.  Would it go between pins 1/2 on the LM386 because comparing the pinouts they seem to be analogs?






PRR

LM386 is not a conventional op-amp. Bias and feedback are built-in.

The LM386 is a single, the TL072 is a dual. The pinouts differ.
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GibsonGM

Like Paul said - a different thing.  You might try just breadboarding it, and see what kind of clipping you get. Some people really like it, and some don't.  This is not a clean opamp kind of thing :)

The chip itself clips, and IMO is analogous to the TS-style diodes in the feedback loop. It seems a bit 'fizzier' to my ear, but has its rightful place in the dirty OD collection.
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Shoeman

Having built a few 386 based boxes myself,  I bet you'll find diode clipping is not needed.  But build it and see.
Geoff
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idsnowdog

Soft clipping between pins 1&2 of the LM386 does work but it works better on the 1st JFET.