Mxr Carbon Copy Schematic Apr 2026

On the schematic, trace the signal from the pre-emphasis filter. It goes into pin 1 or 16 of the NE570. This chip is brilliant because it contains both a rectifier (to measure the volume) and a gain cell (to turn it down). Here is the star of the show. The V3205SD is a 4096-stage BBD. The number "4096" matters. It means the maximum delay time is roughly half that of the old 1024-stage chips (like the MN3005), but it’s much quieter and easier to power.

Keep building. Keep tweaking. Keep the analog dream alive. Mxr Carbon Copy Schematic

The delayed (and compressed/expanded/filtered) signal goes through the . This is a simple voltage divider. When the Mix is at noon, you have equal parts dry and wet. When it’s maxed, you have only the wet signal (great for using the pedal as a weird vibrato unit). On the schematic, trace the signal from the

Then, the signal goes back into the . This is the expander . Remember how we compressed the signal earlier? The expander does the opposite. It turns quiet signals down and loud signals up to restore your original dynamics. Here is the star of the show