Enclosure not stated · 6 knobs
Pre Amp From Hell - Randall rg100es Pre AmpVerified
Based on the Pre Amp From Hell - Randall rg100es Pre Amp
- Category
- Distortion
- Build
- Vero· 22×14· 24 cuts, 6 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Distortion, Pre Amp, Randall
From the post
Demo by MTK
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 35 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- 250pF at column 4, rows K-M: printed clearly, unusual value
- D1-D2: legend says only '4 V Zener', no part number
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×3 | 1M | 1M | read from the layout by eye | |
| ×3 | 2.2K | 2.2k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| Capacitors 12 | ||||
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 470nF | 470n | read from the layout by eye | |
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×2 | 4.7nF | 4.7n | read from the layout by eye | |
| ×2 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 250pF | 250p | read from the layout by eye | |
| ×1 | 22pF | 22p | read from the layout by eye | |
| Diodes 5 | ||||
| D1 | 4V Zener | 4V | read from the layout by eye | |
| D2 | 4V Zener | 4V | read from the layout by eye | |
| D3 | 1N914 | 1N914 | read from the layout by eye | |
| D4 | 1N914 | 1N914 | read from the layout by eye | |
| D5 | 1N5818 | 1N5818 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | 2N5484 | 2N5484 | JFET; read from the layout by eye | |
| Q2 | 2N5484 | 2N5484 | JFET; read from the layout by eye | |
| Q3 | 2N5484 | 2N5484 | JFET; read from the layout by eye | |
| Q4 | 2N5484 | 2N5484 | JFET; read from the layout by eye | |
| Potentiometers 6 | ||||
| Gain | B50K | B50k | Potentiometer | read from the layout by eye |
| Bass | B50K | B50k | Potentiometer | read from the layout by eye |
| Treble | B50K | B50k | Potentiometer | read from the layout by eye |
| Mid | B2K | B2k | Potentiometer | read from the layout by eye |
| Presence | B2K | B2k | Potentiometer | read from the layout by eye |
| Volume | B10K | B10k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×2 | 50K | 50k | read from the layout by eye | |
| Switches 1 | ||||
| Switch | SPST | SPST | read from the layout by eye | |