here are some of the circuits i’ve built over the past year or so, i’ll give this page more organization later
built into repurposed Heathkit enclosures out of vintage opamp labs components. One for myself, one went to Berlin. Switchable input impedance between 600 and 50 ohms. Stepped gain on mine, variable on the other. vintage meters.
I’ve built a few of these now. completely discrete synth + boost.