125B · 3 knobs
GaleBooster / Limiter
Based on the SoloDallas SVDS
- Category
- Boost· Booster, Optical Limiter
- Controls
- Pregain · Threshold · Volume
- Difficulty
- Easy
- Price
- $12.50in stock
From the vendor
A pedal adaptation of the Schaffer-Vega Diversity System (SVDS), the first widely-used wireless system for guitar, famously used by AC/DC, Van Halen, Kiss, and Pink Floyd.
The Gale Booster / Limiter is a pedal adaptation of the Schaffer-Vega Diversity System, and more directly based on the SoloDallas Storm (version 2, 2019, traced by Aion FX). The SVDS was designed by Ken Schaffer and released in 1976 by the Vega Corporation. It was the first wireless system that was reliable enough to be used by major touring acts.
While it was used by several famous guitarists including Ace Frehley, David Gilmour and Eddie Van Halen, it’s Angus Young of AC/DC whose tone was most impacted by it. He found that when he was in the studio, he couldn’t get quite the same tone as he got on stage, so he ended up running his guitar through the wireless unit even when recording.
Because of this, the SVDS joins the ranks of the SDD-3000 and Echoplex EP-3 as an effect unit whose coloration was desirable even when the main part of the effect wasn’t used. In the pedal adaptation, the actual wireless portions of the SVDS have been removed, leaving only the pregain, limiter, and output amplifier, which form the core analog signal path of the original unit.
The Gale is a direct adaptation of the Storm with no changes except for some added power filtering.
Disclaimer: Aion FX is in no way affiliated with SoloDallas. Any trademarks are property of their owners and used only for comparative purposes. SoloDallas makes a wide range of incredibly high-quality products. If you like what they do, support them!
Schematic
The schematic is in the vendor's build document, page 6. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 53 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 17 | ||||
| R1 | 2k | 2k | Metal film resistor, 1/4W | |
| R2 | 1M | 1M | Metal film resistor, 1/4W | |
| R3 | 2k | 2k | Metal film resistor, 1/4W | |
| R4 | 15k | 15k | Metal film resistor, 1/4W | |
| R5 | 1k | 1k | Metal film resistor, 1/4W | |
| R6 | 10k | 10k | Metal film resistor, 1/4W | |
| R7 | 10k | 10k | Metal film resistor, 1/4W | |
| R8 | 2k | 2k | Metal film resistor, 1/4W | |
| R9 | 8k2 | 8.2k | Metal film resistor, 1/4W | |
| R10 | 2k | 2k | Metal film resistor, 1/4W | |
| R11 | 10R | 10 | Metal film resistor, 1/4W | |
| R12 | 10R | 10 | Metal film resistor, 1/4W | |
| R13 | 10k | 10k | Metal film resistor, 1/4W | |
| R14 | 10k | 10k | Metal film resistor, 1/4W | |
| R15 | 10R | 10 | Metal film resistor, 1/4W | |
| R16 | 10R | 10 | 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 16 | ||||
| C2 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C3 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C4 | 120pF | 120p | MLCC capacitor, NP0/C0G | Measured value 130pF in original. |
| C6 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C7 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C8 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C10 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C12 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C13 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. |
| C14 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C15 | 100n | 100n | MLCC capacitor, X7R | |
| C16 | 10uF | 10u | Electrolytic capacitor, 5mm | |
| C17 | 100n | 100n | MLCC capacitor, X7R | |
| C18 | 100n | 100n | MLCC capacitor, X7R | |
| Diodes 5 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | BAT42 | BAT42 | Schottky diode, DO-35 | |
| D3 | BAT42 | BAT42 | Schottky diode, DO-35 | |
| D4 | BAT42 | BAT42 | Schottky diode, DO-35 | |
| D5 | BAT42 | BAT42 | Schottky diode, DO-35 | |
| ICs 2 | ||||
| IC1 | RC4558P | RC4558P | Operational amplifier, DIP8 | |
| IC2 | LM386N-1 | LM386N-1 | Audio amplifier, DIP8 | |
| Opto 1 | ||||
| VACT | NSL-32 | NSL-32 | Vactrol/opto-isolator, NSL-32 | |
| Potentiometers 3 | ||||
| PRE. | 100kB | B100k | 16mm right-angle PCB mount pot | |
| THR. | 100kA | A100k | 16mm right-angle PCB mount pot | |
| VOL. | 1kB | B1k | 16mm right-angle PCB mount pot | |
| Switches 1 | ||||
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 5 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IC2-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 | Mouser 163-4302-E 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. |