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Sca35 tone controls

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In the process of rebuilding a Dynaco SCA-35 w new boards and transformers, I was going to do away with the tone controls, but decided to keep as close to the original design as I could,but have decided to at least to either re-build the PEC's or go with a different passive design altogether,below I have a design I'm considering that has a flatter response,and fewer controls,I'm eliminating all e switches except for the power of course,but was curious about the source and load using the modified tone control,thanks for any advice.

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