D-Lab ECB-A board Technical update Convert tone to Bass Treble controls Fender Princeton Tube type

Simple modification to the D-lab ECB-A board. This update will allow you to change the circuit from basic tone to separate Bass Treble controls. Tone designs were adopted from the Fender 5F2 and AA1164 Princeton circuits. A quick effective mod to the existing board. Instruction sheet can be e-mailed on request. I have new designs underway. See d-labelectronics.com for more info
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