Enclosure not stated · 5 knobs
Marshall 3005 PreampVerified
Based on the Marshall 3005 Preamp
- Category
- Preamp / Amp-in-a-box
- Build
- Vero· 19×9· 10 cuts, 3 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Marshall, Pre-amp
From the post
The Marshall 3005 Lead 12 was a mini-stack with a 12 watt solid state head made in England between 1988 and 1991. People claim it's a great amp and can get vintage Marshall sounds from it, and that it takes overdrives really well.
One note in the amp the preamp was powered by +16V/-16V so you'll want to build a bipolar power board.
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 21 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 1 value the reader of this layout was not sure of
- 60k (far left, column 2): clearly printed '60k', a non-standard value; possibly meant 68k in the source
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×3 | 10k | 10k | read from the layout by eye | |
| ×1 | 60k | 60k | as printed; read from the layout by eye | |
| ×1 | 33k | 33k | read from the layout by eye | |
| ×1 | 56k | 56k | read from the layout by eye | |
| ×1 | 330k | 330k | read from the layout by eye | |
| ×1 | 4.7k | 4.7k | read from the layout by eye | |
| ×1 | 220k | 220k | read from the layout by eye | |
| ×1 | 220r | 220 | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 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 | |
| ×1 | 2nF | 2n | read from the layout by eye | |
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | 1458 | 1458 | read from the layout by eye | |
| Potentiometers 5 | ||||
| Gain | B22K | B22k | Potentiometer | printed '22k Linear'; read from the layout by eye |
| Treble | B22K | B22k | Potentiometer | printed '22k Linear'; read from the layout by eye |
| Bass | B22K | B22k | Potentiometer | printed '22k Linear'; read from the layout by eye |
| Mids | B4.7K | B4.7k | Potentiometer | printed '4.7k Linear'; read from the layout by eye |
| Volume | A1M | A1M | Potentiometer | printed '1M Log'; read from the layout by eye |