Enclosure not stated · 2 knobs
Tim Escobedo Wobbletron
Based on the Tim Escobedo Wobbletron· 1 other board clones it
- Category
- Vibrato / Chorus
- Price
- see vendor
From the vendor
Tim Escobedo's simple vibrato (v0.9, 08/04): one MPSA18 phase-shift stage whose shift is varied by a J201, driven by Darren Inwood and Rob Strand's pulsing-LED phase-shift oscillator. The post shows it because the MagnaVibe is nearly the same circuit with an LED/LDR in place of the JFET.
C1 can be changed in value for a different vibrato tone. More audio phase-shift stages can be added for a more dramatic effect.
Schematic
The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.
Parts list 22 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- The input capacitor's value is not written on the drawing.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| R1 | 2.2M | 2.2M | collector to base; read from the schematic by eye | |
| R2 | 10K | 10k | collector; read from the schematic by eye | |
| R3 | 10K | 10k | emitter; read from the schematic by eye | |
| R4 | 100K | 100k | output; read from the schematic by eye | |
| R5 | 2.2K | 2.2k | LFO; read from the schematic by eye | |
| R6 | 22K | 22k | LFO; read from the schematic by eye | |
| R7 | 2.2M | 2.2M | LFO; read from the schematic by eye | |
| R8 | 10K | 10k | LED resistor; read from the schematic by eye | |
| R9 | 220K | 220k | read from the schematic by eye | |
| Capacitors 7 | ||||
| C2 | ? | ? | input; value not written; read from the schematic by eye | |
| C1 | 100n | 100n | phase-shift; read from the schematic by eye | |
| C3 | 100n | 100n | output; read from the schematic by eye | |
| C4 | 1u | 1u | LFO, electrolytic; read from the schematic by eye | |
| C5 | 1u | 1u | LFO, electrolytic; read from the schematic by eye | |
| C6 | 1u | 1u | LFO, electrolytic; read from the schematic by eye | |
| C7 | 100n | 100n | LFO to Depth; read from the schematic by eye | |
| Transistors 3 | ||||
| Q1 | MPSA18 | MPSA18 | read from the schematic by eye | |
| Q2 | J201 | J201 | variable resistance; read from the schematic by eye | |
| Q3 | MPSA18 | MPSA18 | LFO; read from the schematic by eye | |
| Potentiometers 2 | ||||
| Freq | 25K | 25k | Potentiometer | read from the schematic by eye |
| Depth | 500K | 500k | Potentiometer | read from the schematic by eye |
| LEDs 1 | ||||
| LED1 | LED | LED | red; read from the schematic by eye | |
Other boards based on the Tim Escobedo Wobbletron
- DuoVibe Eff Dub Audio