Enclosure not stated · 3 knobs
Mesa Boogie Grid SlammerVerified
Based on the Mesa Boogie Grid Slammer· 1 other board clones it
From the post
I was in two minds over posting this because it is almost exactly an Ibanez TS9, but I thought I would just because if someone does want to build one they have a ready made layout and so won't have to look up what changes to make. To emphasise how close it is I've also included a toggle to switch between Grid Slammer and a TS9. Basically the difference is just a Timmy clipping diode arrangement, but if anyone wants a Grid Slammer or even a TS9 then at least this will give them two pedals in one. :o)
How much mileage are they going to get out of this design?
Info from Mesa about the original:
The GRID SLAMMER Overdrive is an overdrive pedal that produces a variable boost in gain over a wide range with a classic, guitar-centric midrange bump that enhances many different playing styles. It’s a true overdrive “specialist” that covers an amazing array of what many top players consider the most expressive and musical ranges of overdrive. From sweet, subtle breakup to a harmonically smoldering overdrive that can both sting and sing, the GRID SLAMMER sets a new bar in legendary overdrive!
PRODUCT FEATURES:
Designed and Hand-Built in Petaluma, California, USA True Bypass On/Off Switching - Bypasses all circuitry when off to ensure no tonal loss Gain Control allows you to dial in the perfect amount of vintage breakup or classic overdrive Master Level Control provides a variable range of signal boost up to +20db Tone Control balances the amount of high frequencies On/Off Status LED 9V Battery Powered or optional AC Powered via External Power Jack Input Input & Output Jacks (Nominal Input -20 db)
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 25 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
- Tone pot printed '20K W' (W taper); entered as W20K
- The two 1u caps are drawn as orange ovals, not cans: type (tantalum or non-polarised) not stated
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×6 | 10K | 10k | read from the layout by eye | |
| ×4 | 1K | 1k | read from the layout by eye | |
| ×2 | 510K | 510k | read from the layout by eye | |
| ×1 | 51K | 51k | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 220R | 220 | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| Capacitors 8 | ||||
| ×1 | 51p | 51p | read from the layout by eye | |
| ×1 | 22n | 22n | read from the layout by eye | |
| ×1 | 47n | 47n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×2 | 220n | 220n | read from the layout by eye | |
| ×2 | 1u | 1u | read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×2 | 47u | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×6 | 1N4148 | 1N4148 | D1-D6, mounted on the clipping switch; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2SC1815 | 2SC1815 | read from the layout by eye | |
| Q2 | 2SC1815 | 2SC1815 | read from the layout by eye | |
| ICs 1 | ||||
| IC | JRC4558D | JRC4558D | read from the layout by eye | |
| Potentiometers 3 | ||||
| Drive | A500K | A500k | Potentiometer | wires labelled Gain; read from the layout by eye |
| Tone | W20K | W20k | Potentiometer | read from the layout by eye |
| Level | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Grid Slammer / TS9 | DPDT | DPDT | toggle, clipping select; read from the layout by eye | |
Other boards based on the Mesa Boogie Grid Slammer
- Grid Slammer PCBWay: Glory to Ukraine