Here is an old forgotten old cat...
It is basically a Controfuzz followed by three seperate channels for the Treble, Bass and Mid controls. The fuzz can be bypassed so it can serve as an EQ pedal only as well.
Some improvements had to be done to make it more practical.
1. An onboard voltage inverter is added for the required bipolar power supply.
2. Bypass switching.
3. A Master volume control at the output.
4. The ancient 14 pin uA748 single op amps is replaced with dual channel op amps. 1458 op amps has the closest spec to the original but it is worth experimenting with higher fidelity op amps for the EQ section and the summing amp (IC2 and IC3).
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