1590B · 3 knobs
Lumpy's Tone Shop Lemon Drop/ZII/Series 7Verified
Based on the Lumpy's Tone Shop Lemon Drop OD· 5 other boards clone it
- Category
- Preamp / Amp-in-a-box
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Amp Emulator, Fuzz, Lumpy's Tone Shop, Overdrive
From the post
Here's a simple little overdrive designed to emulate the old Vox 4 and 7 series amps (used by the likes of Jimmy Page and the Beatles). Pots are board mounted and it should fit in a 1590B easily. I've added a trimmer to bias the JFET at little easier. Schematic and voltages can be found here on FSB. From the manufacturer:
The 7 Series Overdrive captures the aggressive qualities of the solid state preamp found in the 4&7 series amps by using a pseudo hybrid setup consisting of a specifically selected silicon transistor for the first stage which adds a distinct bite and growl. That pushes an FET stage into clipping adding some warmth, sustain and amp like dynamics to the tone and feel. The end result is a highly effective emulation of the amp and a unique sonic blend that could be characterized as a "fuzzy overdrive."
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 Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 22 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 10pF | 10p | read from the layout by eye | |
| ×1 | 470pF | 470p | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×2 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | BC108B | BC108B | read from the layout by eye | |
| Q2 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Potentiometers 3 | ||||
| Filter | A100K | A100k | Potentiometer | read from the layout by eye |
| Gain | A100K | A100k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10K | 10k | read from the layout by eye | |
Other boards based on the Lumpy's Tone Shop Lemon Drop OD
- Lumpy's Tone Shop Lemon Drop OD Dirtbox Layouts
- Lemming Drop Five Cats Pedals · £4.50
- Lemmo Drop Drive Fuzz Dog · 1590B · £26.40
- Lemonade Overdrive PedalPCB · 125B · $8.00
- Lumpy's Tone Shop Lemon Drop/ZII/Series 7 Tagboard Effects