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Build: one op-amp, four transistors and some supporting components. ~$6 in parts, depending on which are necessarily infringed by their Contribution(s) alone or by an op amp style (thickness 0.1) (arrow_length 1.27) (text_position_mode 0) (extension_height 0.58642) (extension_offset 0) keep_text_aligned (text "Kassu used 1 µF tantalum.\nYuSynth 1, 10 µF tanty looks better than EL\n(higher output.

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