125B · 1 knob
Massive Amp
Based on the MXR Micro Amp· 9 other boards clone it
From the vendor
Classic Micro Amp modified for 18v of bipolar headroom.
Massive Amp is an MXR Micro Amp with an 18v bipolar charge pump. Just a big loud clean boost to drive any amp. I’ve changed a few values to ones that are more readily on hand.
Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 28 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| R1 | 1m | 1M | ||
| R2 | 10m | 10M | ||
| R3 | 1k | 1k | ||
| R4 | 47k | 47k | ||
| R5 | 1k | 1k | ||
| R6 | 470r | 470 | ||
| R7 | 10k | 10k | ||
| CLR | 2k2 | 2.2k | ||
| Capacitors 11 | ||||
| C1 | 100n | 100n | ||
| C2 | 47p | 47p | ||
| C3 | 10uF | 10u | ||
| C5 | 10uF | 10u | ||
| C6 | 100uF | 100u | ||
| C7 | 10uF | 10u | ||
| C8 | 10uF | 10u | ||
| C9 | 10uF | 10u | ||
| C10 | 100uF | 100u | or 25v | |
| C11 | 100uF | 100u | ||
| C12 | 100uF | 100u | or 25v | |
| Diodes 6 | ||||
| D1 | 1n5817 | 1N5817 | ||
| D2 | 1n5817 | 1N5817 | ||
| D3 | 1n5817 | 1N5817 | ||
| D4 | 1n5817 | 1N5817 | ||
| D5 | 1n5817 | 1N5817 | ||
| D6 | 1n5817 | 1N5817 | ||
| ICs 2 | ||||
| IC1 | TL072 | TL072 | ||
| IC2 | LT1054 | LT1054 | ||
| Potentiometers 1 | ||||
| BOOST | C500k | C500k | ||
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