Enclosure not stated · 1 knob
Electro Harmonix Echo Flanger 2
Based on the Electro-Harmonix Echo Flanger 2
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 91 rows
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Check before you build · 6 values the reader of this schematic was not sure of
- C15: .0015 could be .0045
- C11.1: .001 or .004 (the annotator was unsure too)
- C16: .018 from a pencil note marked ?
- C29: designator could be C24 (C24 is also the 5uF at R27)
- C2.1 and C13.1: .001 smudged
- R8: drawn as adjustable, 2.4K
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 44 | ||||
| R1 | 100K | 100k | read from the schematic by eye | |
| R1.1 | 18K | 18k | smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| R1.2 | 100K | 100k | read from the schematic by eye | |
| R2 | 47K | 47k | read from the schematic by eye | |
| R3 | 47K | 47k | read from the schematic by eye | |
| R4 | 3.01K | 3.01k | 1%; read from the schematic by eye | |
| R5 | 3.01K | 3.01k | 1%; read from the schematic by eye | |
| R6 | 3.01K | 3.01k | 1%; read from the schematic by eye | |
| R7 | 68K | 68k | read from the schematic by eye | |
| R8 | 2.4K | 2.4k | drawn with an arrow (adjustable); read from the schematic by eye | |
| R9 | 100K | 100k | read from the schematic by eye | |
| R10 | 2.7K | 2.7k | read from the schematic by eye | |
| R11 | 18K | 18k | smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| R12 | 100K | 100k | read from the schematic by eye | |
| R13 | 100K | 100k | read from the schematic by eye | |
| R14 | 100K | 100k | read from the schematic by eye | |
| R15 | 2.4K | 2.4k | read from the schematic by eye | |
| R16 | 100K | 100k | read from the schematic by eye | |
| R16.1 | 3.01K | 3.01k | 1%; read from the schematic by eye | |
| R17 | 6.19K | 6.19k | 1%; read from the schematic by eye | |
| R18 | 46.4K | 46.4k | 1%; read from the schematic by eye | |
| R19 | 15.8K | 15.8k | 1%; read from the schematic by eye | |
| R20 | 3.01K | 3.01k | 1%; read from the schematic by eye | |
| R21 | 3.01K | 3.01k | 1%; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| R22 | 3.01K | 3.01k | 1%; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| R23 | 2.2M | 2.2M | read from the schematic by eye | |
| R24 | 9.1K | 9.1k | read from the schematic by eye | |
| R25 | 1K | 1k | read from the schematic by eye | |
| R25.1 | 750 | 750 | 750 ohm; read from the schematic by eye | |
| R26 | 27K | 27k | read from the schematic by eye | |
| R27 | 4.7K | 4.7k | read from the schematic by eye | |
| R28 | 4.7K | 4.7k | read from the schematic by eye | |
| R29 | 100K | 100k | read from the schematic by eye | |
| R30 | 1M | 1M | read from the schematic by eye | |
| R32 | 9.1K | 9.1k | read from the schematic by eye | |
| R33 | 100K | 100k | read from the schematic by eye | |
| R34 | 1M | 1M | read from the schematic by eye | |
| R36 | 8.2K | 8.2k | read from the schematic by eye | |
| R36.1 | 8.2K | 8.2k | read from the schematic by eye | |
| R36.2 | 100K | 100k | read from the schematic by eye | |
| R37 | 220K | 220k | smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| R37.1 | 100 | 100 | 100 ohm; read from the schematic by eye | |
| R38 | 8.2K | 8.2k | read from the schematic by eye | |
| ×1 | 100K | 100k | no designator: IC1A bias to +2.5V; read from the schematic by eye | |
| Capacitors 34 | ||||
| C1 | 0.1uF | 100n | read from the schematic by eye | |
| C1.1 | .0047uF | 4.7n | 5%; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| C2 | 1uF | 1u | 10V; read from the schematic by eye | |
| C2.1 | .001uF | 1n | smudged; read from the schematic by eye | |
| C3 | 0.22uF | 220n | tantalum; read from the schematic by eye | |
| C4 | 5uF | 5u | read from the schematic by eye | |
| C5 | 15uF | 15u | 10V; read from the schematic by eye | |
| C6 | .003uF | 3n | 5%; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| C7 | .0027uF | 2.7n | 5%; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| C8 | .047uF | 47n | 5%; read from the schematic by eye | |
| C9 | 0.1uF | 100n | smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| C10 | .1uF | 100n | read from the schematic by eye | |
| C11 | .1uF | 100n | read from the schematic by eye | |
| C11.1 | .001uF | 1n | ceramic; the annotator was unsure: .001 or .004; read from the schematic by eye | |
| C12 | .1uF | 100n | read from the schematic by eye | |
| C13 | .1uF | 100n | read from the schematic by eye | |
| C13.1 | .001uF | 1n | smudged; read from the schematic by eye | |
| C14 | .0027uF | 2.7n | 5%; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| C15 | .0015uF | 1.5n | 5%; read from the schematic by eye | |
| C16 | .018uF | 18n | 5%; pencil annotation marked with ?; read from the schematic by eye | |
| C17 | .0022uF | 2.2n | 5%; read from the schematic by eye | |
| C18 | .047uF | 47n | 5%; read from the schematic by eye | |
| C19 | 5uF | 5u | read from the schematic by eye | |
| C20 | 0.22uF | 220n | tantalum; read from the schematic by eye | |
| C21 | 15uF | 15u | 10V; read from the schematic by eye | |
| C22 | .047uF | 47n | 5%; read from the schematic by eye | |
| C23 | 0.01uF | 10n | read from the schematic by eye | |
| C24 | 5uF | 5u | read from the schematic by eye | |
| C25 | 5uF | 5u | 15V; read from the schematic by eye | |
| C28 | 4.7uF | 4.7u | read from the schematic by eye | |
| C28.1 | .0047uF | 4.7n | read from the schematic by eye | |
| C29 | 4.7uF | 4.7u | 15V; read from the schematic by eye | |
| C29.1 | .0022uF | 2.2n | read from the schematic by eye | |
| ×1 | .047uF | 47n | no designator: ceramic, IC1A + input to ground; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| ICs 7 | ||||
| IC1 | 4558 | 4558 | dual op amp; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| IC2 | NE570 | NE570 | compander: IC2A compressor, IC2B expander; read from the schematic by eye | |
| IC3 | SAD1024A | SAD1024A | dual BBD (IC3A/IC3B); read from the schematic by eye | |
| IC4 | SAD1024A | SAD1024A | BBD; read from the schematic by eye | |
| IC5 | 4558 | 4558 | dual op amp; smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| IC6 | CD4053 | CD4053 | analog switch (mode and bypass sections); read from the schematic by eye | |
| IC7 | ? | ? | analog switch section, no part number given; read from the schematic by eye | |
| Potentiometers 1 | ||||
| Feedback | 10K A | A10k | Potentiometer | VR4, 10K log per the pencil note; read from the schematic by eye |
| Trimmers 4 | ||||
| TR1 | 100K | 100k | read from the schematic by eye | |
| TR2 | 10K | 10k | read from the schematic by eye | |
| TR3 | 10K | 10k | read from the schematic by eye | |
| TR6 | 1K | 1k | smudged on the print; value from the pencil annotation; read from the schematic by eye | |
| Switches 1 | ||||
| S3 | SPST | SPST | Blend; read from the schematic by eye | |