Enclosure not stated · 2 knobs
Elektor Harmonic Enhancer 2
- Category
- EQ / Filter· Tone Control and EQs
- Controls
- Enhancer Gain · Enhancer Level
- Price
- see vendor
- Tags
- Tone Control and EQs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 66 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 6 values the reader of this schematic was not sure of
- R6/R9: print reads 38k, taken as 39k
- R18: 820Ω or 330Ω
- R22: 3k9 or 2k0
- C3: print reads 160n, taken as 100n
- C10: 56p or 68p
- C20: print reads 380p, taken as 390p
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 24 | ||||
| R1 | 2k2 | 2.2k | read from the schematic by eye | |
| R2 | 56k | 56k | read from the schematic by eye | |
| R3 | 1k | 1k | read from the schematic by eye | |
| R4 | 22k | 22k | read from the schematic by eye | |
| R5 | 10k | 10k | read from the schematic by eye | |
| R6 | 39k | 39k | printed blurry, reads 38k; 39k is the standard value; read from the schematic by eye | |
| R7 | 33k | 33k | read from the schematic by eye | |
| R8 | 100Ω | 100 | read from the schematic by eye | |
| R9 | 39k | 39k | printed blurry, reads 38k; 39k is the standard value; read from the schematic by eye | |
| R10 | 10k | 10k | read from the schematic by eye | |
| R11 | 10k | 10k | read from the schematic by eye | |
| R12 | 1k | 1k | read from the schematic by eye | |
| R13 | 10k | 10k | read from the schematic by eye | |
| R14 | 100k | 100k | read from the schematic by eye | |
| R15 | 1k | 1k | read from the schematic by eye | |
| R16 | 100k | 100k | read from the schematic by eye | |
| R17 | 10k | 10k | read from the schematic by eye | |
| R18 | 820Ω | 820 | LED resistor; blurry, could be 330Ω; read from the schematic by eye | |
| R19 | 10k | 10k | marked with a triangle on the drawing; read from the schematic by eye | |
| R20 | 1M | 1M | read from the schematic by eye | |
| R21 | 10k | 10k | read from the schematic by eye | |
| R22 | 3k9 | 3.9k | blurry, could be 2k0; read from the schematic by eye | |
| R23 | 10k | 10k | read from the schematic by eye | |
| R24 | 10k | 10k | read from the schematic by eye | |
| Capacitors 24 | ||||
| C1 | 1n2 | 1.2n | read from the schematic by eye | |
| C2 | 33p | 33p | read from the schematic by eye | |
| C3 | 100n | 100n | print reads 160n; read from the schematic by eye | |
| C4 | 2n2 | 2.2n | read from the schematic by eye | |
| C5 | 68p | 68p | read from the schematic by eye | |
| C6 | 10uF | 10u | read from the schematic by eye | |
| C7 | 1uF | 1u | 40V; read from the schematic by eye | |
| C8 | 10uF | 10u | 40V; read from the schematic by eye | |
| C9 | 68p | 68p | read from the schematic by eye | |
| C10 | 56p | 56p | blurry, could be 68p; read from the schematic by eye | |
| C11 | 47n | 47n | read from the schematic by eye | |
| C12 | 22uF | 22u | 25V; read from the schematic by eye | |
| C13 | 220n | 220n | read from the schematic by eye | |
| C14 | 1uF | 1u | read from the schematic by eye | |
| C15 | 220n | 220n | read from the schematic by eye | |
| C16 | 22uF | 22u | 25V; read from the schematic by eye | |
| C17 | 100p | 100p | selected by S2; read from the schematic by eye | |
| C18 | 220p | 220p | selected by S2; read from the schematic by eye | |
| C19 | 330p | 330p | selected by S2; read from the schematic by eye | |
| C20 | 390p | 390p | selected by S2; print reads 380p; read from the schematic by eye | |
| C21 | 1uF | 1u | supply decoupling; read from the schematic by eye | |
| C22 | 1uF | 1u | supply decoupling; read from the schematic by eye | |
| C23 | 100n | 100n | supply decoupling; read from the schematic by eye | |
| CE | 1uF | 1u | drawn dashed: optional; read from the schematic by eye | |
| Diodes 5 | ||||
| D1 | Diode | DIODE | no part number given; read from the schematic by eye | |
| D2 | 1N4148 | 1N4148 | read from the schematic by eye | |
| D3 | 1N4148 | 1N4148 | read from the schematic by eye | |
| D5 | 1N4148 | 1N4148 | read from the schematic by eye | |
| D6 | 1N4148 | 1N4148 | read from the schematic by eye | |
| Transistors 4 | ||||
| T1 | BC264A | BC264A | JFET; BF245 handwritten beside it; read from the schematic by eye | |
| T2 | BC550C | BC550C | read from the schematic by eye | |
| T3 | BC560C | BC560C | read from the schematic by eye | |
| T4 | BC547B | BC547B | read from the schematic by eye | |
| ICs 3 | ||||
| IC1 | NE5534AN | NE5534AN | read from the schematic by eye | |
| IC2 | TL071CP | TL071CP | read from the schematic by eye | |
| IC3 | TL072 | TL072 | dual op amp, sections A1 and A2; read from the schematic by eye | |
| Inductors 1 | ||||
| L1 | 1mH | 1mH | drawn as approx. 1mH; read from the schematic by eye | |
| Potentiometers 2 | ||||
| Enhancer Gain | A22K | A22k | Potentiometer | P1, 22k log; read from the schematic by eye |
| Enhancer Level | A10K | A10k | Potentiometer | P2, 10k log; read from the schematic by eye |
| Switches 2 | ||||
| Cut Enhancer | SPST | SPST | S1; read from the schematic by eye | |
| S2 | 4PST | 4PST | 4-way DIP switch selecting C17-C20 at the input; read from the schematic by eye | |
| LEDs 1 | ||||
| D4 | LED | LED | Peak Enhancer indicator; read from the schematic by eye | |