Dr. Quack (EHX™ Doctor Q™)
Dr. Quack is a improved design of the EH™ Doctor Q™ filter from the AMZ site. The Geofex site offers a layout for this great little effect circuit.
- Dr Quack Bill of Materials text file
- Link To The Doctor Q™ Schematic at AMZ
- Link To The Dr Quack Schematic at AMZ (build this one)
- PDF file of the layout from the GEOFEX site
- PDF file of the Ready-For-Transfer Printed Circuit Board Layout
Note that neither the schematic nor the layout lists the unit values of the capacitors. The capacitor values are in microfarads.
This project is another take on an improved Electro-Harmonix™ Dr. Q™ Filter from the home-wrecker.com site and the schematic is here. Thanks to Dean Hazelwanter for the PCB design.