Enclosure not stated · 6 knobs
Mesa Boogie Mark IV Lead Channel EmulatorVerified
Based on the Mesa Boogie Mark IV Lead Channel Emulator
- Category
- Preamp / Amp-in-a-box
- Build
- Vero· 26×16· 32 cuts, 10 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Amp Emulator, Distortion, Mesa Boogie
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 45 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
- 750pF (col 2, rows B-D), 20nF (col 17), 20pF (col 14), 500pF (col 19), 250pF x2, 120pF, 15uF x3: printed clearly, unusual values
- Gain & Drive pots printed '1mA' in the legend: read as A1M
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×4 | 1.5K | 1.5k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 270K | 270k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 680K | 680k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 3.3M | 3.3M | read from the layout by eye | |
| ×1 | 10M | 10M | read from the layout by eye | |
| Capacitors 15 | ||||
| ×1 | 20pF | 20p | read from the layout by eye | |
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 120pF | 120p | read from the layout by eye | |
| ×2 | 250pF | 250p | read from the layout by eye | |
| ×1 | 500pF | 500p | read from the layout by eye | |
| ×1 | 750pF | 750p | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 20nF | 20n | read from the layout by eye | |
| ×4 | 47nF | 47n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×2 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×3 | 15uF | 15u | electrolytic; read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×2 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5818 | 1N5818 | read from the layout by eye | |
| Transistors 5 | ||||
| Q1 | J201 | J201 | JFET; read from the layout by eye | |
| Q2 | J201 | J201 | JFET; read from the layout by eye | |
| Q3 | J201 | J201 | JFET; read from the layout by eye | |
| Q4 | J201 | J201 | JFET; read from the layout by eye | |
| Q5 | J201 | J201 | JFET; read from the layout by eye | |
| Potentiometers 6 | ||||
| Gain | A1M | A1M | Potentiometer | read from the layout by eye |
| Drive | A1M | A1M | Potentiometer | read from the layout by eye |
| Bass | A250K | A250k | Potentiometer | read from the layout by eye |
| Treble | A250K | A250k | Potentiometer | read from the layout by eye |
| Mid | B10K | B10k | Potentiometer | read from the layout by eye |
| Master | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×5 | 100K | 100k | one per JFET stage; read from the layout by eye | |
| Switches 3 | ||||
| Fat | SPST | SPST | read from the layout by eye | |
| Bright | SPST | SPST | read from the layout by eye | |
| Mid Gain | SPST | SPST | read from the layout by eye | |