E Gadgets 4: Bread Board of Impedance Transformer and DIY Preamp with LM386

Last Updated on November 18, 2020

First Published on May 13, 2020

Upper Side: Download PDF File: Impedance Transformer

The impedance transformer is tested at "Ukulele 1, DIY Piezo Pickup" in advance.

Lower Side: Download PDF File: Preamp

I change RV2 of Preamp 100 ohms to 1K ohms.

The Jack on the green board is the output of Preamp.

I'm considering of docking these to solder and casing.

Updated on 11/18/2020: In my experience on making a compressor, BF256B doesn't seem to invert the phase. Whereas, 2SK209-BL inverts the phase. Also check out "LesPaul 7: Go Customize".

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