Enclosure not stated · 2 knobs
Dr Q Autowah
Based on the Electro-Harmonix Doctor Q· 2 other boards clone it
- Category
- Wah / Envelope
- Price
- $7.99
From the vendor
The Dr Q is a classic DIY autowah project that delivers a highly interactive envelope filter effect. It responds to your playing dynamics to create the distinctive choppy rhythm of the 1970s funk recordings.
Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 34 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| R1 | 1M | 1M | 1M Ohm 1/4W 1% Metal Film Resistor | |
| R2 | 1M | 1M | 1M Ohm 1/4W 1% Metal Film Resistor | |
| R3 | 10k | 10k | 10K Ohm 1/4W 1% Metal Film Resistor | |
| R4 | 47k | 47k | 47K Ohm 1/4W 1% Metal Film Resistor | |
| R5 | 2.2M | 2.2M | 2.2M Ohm 1/4W 1% Metal Film Resistor | |
| R6 | 10k | 10k | 10K Ohm 1/4W 1% Metal Film Resistor | |
| R7 | 47 | 47 | 47 Ohm 1/4W 1% Metal Film Resistor | |
| R8 | 100 | 100 | 100 Ohm 1/4W 1% Metal Film Resistor | |
| R9 | 22k | 22k | 22K Ohm 1/4W 1% Metal Film Resistor | |
| R10 | 47k | 47k | 47K Ohm 1/4W 1% Metal Film Resistor | |
| R11 | 47k | 47k | 47K Ohm 1/4W 1% Metal Film Resistor | |
| R12 | 470k | 470k | 470K Ohm 1/4W 1% Metal Film Resistor | |
| R13 | 470k | 470k | 470K Ohm 1/4W 1% Metal Film Resistor | |
| R14 | 470k | 470k | 470K Ohm 1/4W 1% Metal Film Resistor | |
| R15 | 47k | 47k | 47K Ohm 1/4W 1% Metal Film Resistor | |
| R16 | 47k | 47k | 47K Ohm 1/4W 1% Metal Film Resistor | |
| Capacitors 10 | ||||
| C1 | 47n | 47n | 47Nf 100V 5% Polyester Film Box Type Capacitor | |
| C2 | 47n | 47n | 47Nf 100V 5% Polyester Film Box Type Capacitor | |
| C3 | 10u | 10u | 10Uf 50V Electrolytic Capacitor 5X11Mm | |
| C4 | 4.7n | 4.7n | 4.7Nf 100V 5% Polyester Film Box Type Capacitor | |
| C5 | 4.7n | 4.7n | 4.7Nf 100V 5% Polyester Film Box Type Capacitor | |
| C6 | 1n | 1n | 1Nf 100V 5% Polyester Film Box Type Capacitor | |
| C7 | 10u | 10u | 10Uf 50V Electrolytic Capacitor 5X11Mm | |
| C8 | 47n | 47n | 47Nf 100V 5% Polyester Film Box Type Capacitor | |
| C9 | 10n | 10n | 10Nf 100V 5% Polyester Film Box Type Capacitor | |
| C10 | 10u | 10u | 10Uf 50V Electrolytic Capacitor 5X11Mm | |
| Diodes 1 | ||||
| D3 | 1N914 | 1N914 | 1N914 Small Signal Diode 200Ma 100V | |
| Transistors 2 | ||||
| Q1 | 2N5457 | 2N5457 | Smd Sot-23 2N5457 Jfet N-Channel Transistor | |
| Q2 | 2N3904 | 2N3904 | 2N3904 Npn General Purpose Transistor | |
| ICs 1 | ||||
| U1 | TL072 | TL072 | Tl072 Operational Amplifier | |
| Potentiometers 2 | ||||
| Sens | 100K-B | B100k | 100K Ohm Linear Potentiometer Angled | |
| Range | 20k/25k-B Trim | 20K/25K-B TRIM | 20K Ohm Trimmer Potentiometer Cermet 1 Turn 3362P | |
| LEDs 2 | ||||
| D1 | LED | LED | Led 3Mm Red | |
| D2 | LED | LED | Led 3Mm Red | |
Other boards based on the Electro-Harmonix Doctor Q
- Electro Harmonix Doctor Q Experimentalists Anonymous
- EHX Doctor Q Tagboard Effects