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Mixers and EQs
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- Utility· Tone Control and EQs
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- Tone Control and EQs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 79 rows
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Check before you build · 2 values the reader of this schematic was not sure of
- TBE-×1 4k3: could be 4k7 in low-res pixel font
- TBE-×2 LM833: three sections drawn, chip count assumed
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 23 | ||||
| PRE-×4 | 1K | 1k | read from the schematic by eye | |
| PRE-×2 | 470R | 470 | read from the schematic by eye | |
| PRE-×1 | 47K | 47k | read from the schematic by eye | |
| LD-×2 | 33R | 33 | read from the schematic by eye | |
| LD-×2 | 100R | 100 | read from the schematic by eye | |
| LD-×2 | 10K | 10k | read from the schematic by eye | |
| LD-×1 | 100K | 100k | read from the schematic by eye | |
| BMT-×3 | 33k | 33k | read from the schematic by eye | |
| BMT-×2 | 12k | 12k | read from the schematic by eye | |
| BMT-×2 | 10k | 10k | read from the schematic by eye | |
| GEQ-×3 | 100k | 100k | input, ground return and output feedback; read from the schematic by eye | |
| GEQ-×10 | 10K | 10k | two per gyrator band; read from the schematic by eye | |
| VSM-×2 | 22K | 22k | read from the schematic by eye | |
| VSM-×1 | 10K | 10k | read from the schematic by eye | |
| VSM-×2 | 4K7 | 4.7k | read from the schematic by eye | |
| VSM-×1 | 1K | 1k | read from the schematic by eye | |
| VSM-×2 | 2k2 | 2.2k | read from the schematic by eye | |
| VSM-×2 | 2k7 | 2.7k | read from the schematic by eye | |
| TBE-×6 | 2k2 | 2.2k | read from the schematic by eye | |
| TBE-×1 | 5K1 | 5.1k | read from the schematic by eye | |
| TBE-×2 | 4k7 | 4.7k | read from the schematic by eye | |
| TBE-×2 | 2k7 | 2.7k | read from the schematic by eye | |
| TBE-×1 | 4k3 | 4.3k | read from the schematic by eye | |
| Capacitors 33 | ||||
| PRE-×3 | 1n5 | 1.5n | read from the schematic by eye | |
| PRE-×1 | 10u | 10u | bipolar (BP); read from the schematic by eye | |
| PRE-×1 | 15n | 15n | read from the schematic by eye | |
| PRE-×1 | 10u | 10u | electrolytic, output; read from the schematic by eye | |
| LD-×2 | 47u | 47u | electrolytic; read from the schematic by eye | |
| LD-×1 | 10u | 10u | electrolytic; read from the schematic by eye | |
| BMT-×1 | .015uF | 15n | read from the schematic by eye | |
| BMT-×1 | .0027uF | 2.7n | read from the schematic by eye | |
| BMT-×1 | .012uF | 12n | read from the schematic by eye | |
| BMT-×1 | .0015uF | 1.5n | read from the schematic by eye | |
| BMT-×1 | 39pF | 39p | read from the schematic by eye | |
| BMT-×1 | 10u | 10u | electrolytic; read from the schematic by eye | |
| GEQ-×2 | 150n | 150n | read from the schematic by eye | |
| GEQ-×1 | 680n | 680n | read from the schematic by eye | |
| GEQ-×1 | 33n | 33n | read from the schematic by eye | |
| GEQ-×2 | 8n2 | 8.2n | read from the schematic by eye | |
| GEQ-×1 | 39n | 39n | read from the schematic by eye | |
| GEQ-×2 | 1n0 | 1n | in parallel at 3.2KHz; read from the schematic by eye | |
| GEQ-×1 | 470p | 470p | read from the schematic by eye | |
| GEQ-×1 | 2n2 | 2.2n | read from the schematic by eye | |
| VSM-×1 | 10u | 10u | electrolytic; read from the schematic by eye | |
| VSM-×1 | 22n | 22n | read from the schematic by eye | |
| VSM-×2 | 8n2 | 8.2n | read from the schematic by eye | |
| VSM-×1 | 330p | 330p | read from the schematic by eye | |
| VSM-×1 | 5n6 | 5.6n | read from the schematic by eye | |
| VSM-×1 | 15n | 15n | read from the schematic by eye | |
| TBE-×3 | 330p | 330p | read from the schematic by eye | |
| TBE-×1 | 39n | 39n | read from the schematic by eye | |
| TBE-×1 | 100n | 100n | read from the schematic by eye | |
| TBE-×1 | 5n6 | 5.6n | read from the schematic by eye | |
| TBE-×1 | 15n | 15n | read from the schematic by eye | |
| TBE-×1 | 1n8 | 1.8n | read from the schematic by eye | |
| TBE-×1 | 4n7 | 4.7n | read from the schematic by eye | |
| ICs 6 | ||||
| PRE-×1 | LM833 | LM833 | dual op amp; the balanced-input stage op amp is unlabeled, presumably the other half; read from the schematic by eye | |
| LD-U3 | LM833 | LM833 | U3A and U3B; read from the schematic by eye | |
| BMT-U2 | LM833 | LM833 | U2A shown; read from the schematic by eye | |
| GEQ-×3 | LM833 | LM833 | six op amp sections drawn (5 gyrators + output); note: any audio op amp; read from the schematic by eye | |
| VSM-U2 | LM833 | LM833 | U2A and U2B; read from the schematic by eye | |
| TBE-×2 | LM833 | LM833 | three op amp sections, all labeled U2B on the drawing; read from the schematic by eye | |
| Potentiometers 17 | ||||
| PRE-Gain Adj | 50K | 50k | Potentiometer | read from the schematic by eye |
| BMT-Bass | 100k | 100k | Potentiometer | read from the schematic by eye |
| BMT-Mid | 100k | 100k | Potentiometer | read from the schematic by eye |
| BMT-Treble | 100k | 100k | Potentiometer | read from the schematic by eye |
| GEQ-50Hz | 100k | 100k | Potentiometer | read from the schematic by eye |
| GEQ-200Hz | 100k | 100k | Potentiometer | read from the schematic by eye |
| GEQ-800Hz | 100k | 100k | Potentiometer | read from the schematic by eye |
| GEQ-3.2KHz | 100k | 100k | Potentiometer | read from the schematic by eye |
| GEQ-12.8KHz | 100k | 100k | Potentiometer | read from the schematic by eye |
| VSM-Bass | 100K | 100k | Potentiometer | read from the schematic by eye |
| VSM-Treb | 100K | 100k | Potentiometer | read from the schematic by eye |
| VSM-Mid Freq | A50K | A50k | Potentiometer | dual-gang, log; read from the schematic by eye |
| VSM-Cut/Boost | B5K | B5k | Potentiometer | lin; read from the schematic by eye |
| TBE-Low Freq | A50K | A50k | Potentiometer | dual-gang, log; read from the schematic by eye |
| TBE-Mid Freq | A50K | A50k | Potentiometer | dual-gang, log; read from the schematic by eye |
| TBE-High Freq | A50K | A50k | Potentiometer | dual-gang, log; read from the schematic by eye |
| TBE-×3 | B5K | B5k | Potentiometer | cut/boost, lin; read from the schematic by eye |