125B · 8 knobs
Vandal from Hell
Based on the Randal RG100ES Pre amp
- Category
- Distortion· Metal Pre-amp, overdrive
- Difficulty
- Intermediate
- Price
- €11.90out of stock
- Tags
- diy-originals
Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.
From the vendor
Project overview
PCB Guitar Mania’s original design inspired by the Preamp From Hell (Randall RG100ES Emulator). I really recommend this build to anyone who is looking for an excellent Metal pre-amp; this brutal high-gain pre-amp/distortion is a must!
Introduction
This is the preamp of the brutal Randall RG100 solid-state amplifier made famous by Dimebag Darrell of Pantera. The best high-gain preamp/distortion you will ever have.
Vandal from Hell is NOT versatile…for METAL players ONLY!
Controls
Potentiometers
• Bass
• Gain
• Mids
• Presence
• Treble
• Volume
For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum and DIY Stomp Boxes Forum.
For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.
Vandal from Hell 2v – Building Docs
Vandal from Hell 2v – Drilling Template
Vandal from Hell 1v – Drilling Template
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 50 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| R12 | 10K | 10k | ||
| R8 | 10K | 10k | ||
| R5 | 1k | 1k | ||
| R13 | 1k | 1k | ||
| R2 | 1m | 1M | ||
| R10 | 1m | 1M | ||
| R11 | 1m | 1M | ||
| R4 | 20k | 20k | ||
| R3 | 2k2 | 2.2k | ||
| R6 | 2k2 | 2.2k | ||
| R14 | 2k2 | 2.2k | ||
| R7 | 4k7 | 4.7k | ||
| R9 | 4k7 | 4.7k | ||
| R15 | 4k7 | 4.7k | ||
| R1 | 68k | 68k | ||
| Capacitors 15 | ||||
| C14 | 100n | 100n | ||
| C2 | 10n | 10n | ||
| C7 | 220n | 220n | ||
| C11 | 220n | 220n | ||
| C1 | 220p | 220p | ||
| C4 | 22n | 22n | ||
| C8 | 22p | 22p | ||
| C6 | 2n2 | 2.2n | ||
| C3 | 470N | 470n | ||
| C5 | 4n7 | 4.7n | ||
| C12 | 4n7 | 4.7n | ||
| C9 | 10u | 10u | ||
| C13 | 10u | 10u | ||
| C10 | 1u | 1u | ||
| C15 | 220u | 220u | ||
| Diodes 5 | ||||
| D0 | 1N5817 | 1N5817 | ||
| D1 | 1N914 | 1N914 | ||
| D2 | 1N914 | 1N914 | ||
| D3 | 4v zener | 4V | ||
| D4 | 4v zener | 4V | ||
| Transistors 4 | ||||
| Q1 | J201* | J201 | ||
| Q2 | J201* | J201 | ||
| Q3 | J201* | J201 | ||
| Q4 | J201* | J201 | ||
| Potentiometers 8 | ||||
| TREBLE | 50k B | B50k | ||
| VOLUME | 10k A | A10k | ||
| MIDS | 2k B | B2k | ||
| PRESENCE | 2k B | B2k | ||
| GAIN | 50k A | A50k | ||
| BASS | 50k B | B50k | ||
| POT1 | 100k | 100k | ||
| POT3 | 100k | 100k | ||
| Switches 2 | ||||
| Channel | 4PDT ON-ON | 4PDT ON-ON | ||
| Sustain | SPDT ON-ON | SPDT ON-ON | ||
| LEDs 1 | ||||
| LED | 3mm red LED | 3MM RED LED | ||