125B · 3 knobs
AntipodeVintage Fuzz
Based on the Roland AF-60 Bee Gee· 2 other boards clone it
- Category
- Fuzz
- Controls
- Distortion · Tone · Volume
- Difficulty
- Easy
- Price
- $12.50in stock
From the vendor
While the circuit is best known as the “Jet” stage from the Roland AP-7 Jet Phaser, the standalone pedal version is much more flexible with a wider tonal palette to play with.
The Antipode Vintage Fuzz is an adaptation of the Roland AF-60 Bee Gee, a fuzz/distortion from 1975 that is best known as the standalone version of the “jet mode” of the legendary AP-7 Jet Phaser.
It features a combination of transistor gain, op-amp gain and diode-based hard clipping to get its character. The tone control is the classic Big Muff “balance” style, centered around 1.3Khz with a very slight mid-boost in the middle position.
The Jet Phaser’s adaptation is largely the same but with fewer controls. The output volume control is retained for the fuzz stage, but the tone control is simplified into a two-position switch with only “full bass” and “full treble” settings. The potentiometer on the AF-60 is much more usable.
The Antipode project has one modification, which is the addition of a gain control to allow the distortion level to be dialed back. In the original, the op-amp gain was fixed at 220, but with this control it can now get as low as 2, getting down into overdrive territory instead of full-on fuzz. With the gain control at maximum, the circuit is 100% identical to a vintage AF-60.
Note: This project uses a type of capacitor that has been temporarily discontinued by WIMA. Please see our news article about the issue and the substitution spreadsheet for project-specific recommendations. We are stocking a limited supply in the mean time. The build document has not yet been updated to reflect this.
Schematic
The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 54 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 22 | ||||
| R1 | 100k | 100k | Metal film resistor, 1/4W | |
| R2 | 15k | 15k | Metal film resistor, 1/4W | |
| R3 | 220k | 220k | Metal film resistor, 1/4W | |
| R4 | 470k | 470k | Metal film resistor, 1/4W | |
| R5 | 470k | 470k | Metal film resistor, 1/4W | |
| R6 | 15k | 15k | Metal film resistor, 1/4W | |
| R7 | 1k | 1k | Metal film resistor, 1/4W | |
| R8 | 10k | 10k | Metal film resistor, 1/4W | |
| R9 | 10k | 10k | Metal film resistor, 1/4W | |
| R10 | 10k | 10k | Metal film resistor, 1/4W | |
| R11 | 2M2 | 2.2M | Metal film resistor, 1/4W | |
| R12 | 10k | 10k | Metal film resistor, 1/4W | |
| R13 | 33k | 33k | Metal film resistor, 1/4W | |
| R14 | 33k | 33k | Metal film resistor, 1/4W | |
| R15 | 1M | 1M | Metal film resistor, 1/4W | |
| R16 | 100k | 100k | Metal film resistor, 1/4W | |
| R17 | 56k | 56k | Metal film resistor, 1/4W | |
| R18 | 15k | 15k | Metal film resistor, 1/4W | |
| R19 | 6k8 | 6.8k | Metal film resistor, 1/4W | |
| R20 | 22k | 22k | Metal film resistor, 1/4W | |
| R21 | 22k | 22k | Metal film resistor, 1/4W | |
| LEDR | 4k7 | 4.7k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 15 | ||||
| C1 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C3 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C4 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C5 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C6 | 270pF | 270p | MLCC capacitor, NP0/C0G | Original is 250pF, but 220pf is the nearest readily-available value. |
| C7 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C8 | 2n2 | 2.2n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C10 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C12 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C13 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C14 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter capacitor. |
| C15 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. |
| Diodes 3 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D3 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | BJT transistor, NPN, TO-92 | Substitute. Original uses 2SC1000GR. |
| Q2 | 2N3904 | 2N3904 | BJT transistor, NPN, TO-92 | Substitute. Original uses 2SC1000GR. |
| ICs 1 | ||||
| IC1 | LM741 | LM741 | Operational amplifier, DIP8 | Original uses TA7504, but LM741 is an equivalent. |
| Potentiometers 3 | ||||
| DIST. | 1MC | C1M | 16mm right-angle PCB mount pot | |
| TONE | 100kB | B100k | 16mm right-angle PCB mount pot | |
| LEVEL | 50kA | A50k | 16mm right-angle PCB mount pot | |
| Switches 1 | ||||
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | Available from Aion FX. |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 4 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IN | 1/4" stereo | 1/4" STEREO | 1/4" phone jack, closed frame | Switchcraft 112BX or equivalent. |
| OUT | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| DC | 2.1mm | 2.1MM | DC jack, 2.1mm panel mount | Lumberg NEB/J 21 C or equivalent. |
| Hardware 2 | ||||
| BATT | Battery snap | BATTERY SNAP | 9V battery snap | Optional. Use the soft plastic type—the hard-shell type will not fit. |
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |