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Mixers and EQs
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- Utility· Buffers Switchers Mixers and Routers
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Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 80 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- 5K1 (three-band low): drawn 'SK1', read as 5K1
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 23 | ||||
| ×4 | 1K | 1k | Pre-amp: input differential stage; read from the schematic by eye | |
| ×2 | 470R | 470 | Pre-amp: one series input, one gain-set to ground; read from the schematic by eye | |
| ×1 | 47K | 47k | Pre-amp: ; read from the schematic by eye | |
| ×2 | 33R | 33 | 600 ohm balanced line driver: ; read from the schematic by eye | |
| ×1 | 100K | 100k | 600 ohm balanced line driver: ; read from the schematic by eye | |
| ×2 | 10K | 10k | 600 ohm balanced line driver: ; read from the schematic by eye | |
| ×2 | 100R | 100 | 600 ohm balanced line driver: ; read from the schematic by eye | |
| ×3 | 33k | 33k | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×2 | 12k | 12k | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×2 | 10k | 10k | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×3 | 100k | 100k | Five-band graphic EQ (50Hz-12.8kHz): input, to ground, feedback; read from the schematic by eye | |
| ×10 | 10K | 10k | Five-band graphic EQ (50Hz-12.8kHz): two per gyrator band; read from the schematic by eye | |
| ×2 | 22K | 22k | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×1 | 10K | 10k | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×2 | 4K7 | 4.7k | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×2 | 2k2 | 2.2k | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×1 | 1K | 1k | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×2 | 2k7 | 2.7k | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×6 | 2k2 | 2.2k | Three-band EQ with variable shelf frequency: two per band; read from the schematic by eye | |
| ×1 | 5K1 | 5.1k | Three-band EQ with variable shelf frequency: low band; read from the schematic by eye | |
| ×2 | 4k7 | 4.7k | Three-band EQ with variable shelf frequency: low and high band; read from the schematic by eye | |
| ×2 | 2k7 | 2.7k | Three-band EQ with variable shelf frequency: mid band; read from the schematic by eye | |
| ×1 | 4k3 | 4.3k | Three-band EQ with variable shelf frequency: high band; read from the schematic by eye | |
| Capacitors 33 | ||||
| ×3 | 1n5 | 1.5n | Pre-amp: ; read from the schematic by eye | |
| ×1 | 10u | 10u | Pre-amp: bipolar (BP); read from the schematic by eye | |
| ×1 | 15n | 15n | Pre-amp: ; read from the schematic by eye | |
| ×1 | 10u | 10u | Pre-amp: output electrolytic; read from the schematic by eye | |
| ×1 | 10u | 10u | 600 ohm balanced line driver: ; read from the schematic by eye | |
| ×2 | 47u | 47u | 600 ohm balanced line driver: output electrolytics; read from the schematic by eye | |
| ×1 | 10u | 10u | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×1 | .015uF | 15n | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×1 | .0027uF | 2.7n | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×1 | .012uF | 12n | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×1 | .0015uF | 1.5n | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×1 | 39pF | 39p | Bass, mid and treble EQ: ; read from the schematic by eye | |
| ×2 | 150n | 150n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×1 | 33n | 33n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×2 | 8n2 | 8.2n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×1 | 39n | 39n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×2 | 1n0 | 1n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×1 | 470p | 470p | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×1 | 680n | 680n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×1 | 2n2 | 2.2n | Five-band graphic EQ (50Hz-12.8kHz): ; read from the schematic by eye | |
| ×1 | 10u | 10u | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×1 | 22n | 22n | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×2 | 8n2 | 8.2n | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×1 | 330p | 330p | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×1 | 5n6 | 5.6n | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×1 | 15n | 15n | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye | |
| ×3 | 330p | 330p | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ×1 | 39n | 39n | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ×1 | 100n | 100n | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ×1 | 5n6 | 5.6n | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ×1 | 15n | 15n | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ×1 | 1n8 | 1.8n | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ×1 | 4n7 | 4.7n | Three-band EQ with variable shelf frequency: ; read from the schematic by eye | |
| ICs 7 | ||||
| ×1 | ? | ? | Pre-amp: op amp, unmarked, differential input stage; read from the schematic by eye | |
| ×1 | LM833 | LM833 | Pre-amp: op amp, pins 5/6/7; read from the schematic by eye | |
| LD-U3 | LM833 | LM833 | 600 ohm balanced line driver: U3A/U3B; read from the schematic by eye | |
| BMT-U2 | LM833 | LM833 | Bass, mid and treble EQ: U2A; read from the schematic by eye | |
| ×3 | LM833 | LM833 | Five-band graphic EQ (50Hz-12.8kHz): six op amp sections drawn; note says any audio op amp will do; read from the schematic by eye | |
| VS-U2 | LM833 | LM833 | Bass/mid/treble EQ with variable shelf mid: U2A and U2B; read from the schematic by eye | |
| ×3 | LM833 | LM833 | Three-band EQ with variable shelf frequency: three sections, each labeled U2B on the drawing (designator clash); read from the schematic by eye | |
| Potentiometers 17 | ||||
| Gain Adj | 50K | 50k | Potentiometer | Pre-amp: drawn as variable resistor; read from the schematic by eye |
| Bass | 100k | 100k | Potentiometer | Bass, mid and treble EQ: ; read from the schematic by eye |
| Mid | 100k | 100k | Potentiometer | Bass, mid and treble EQ: ; read from the schematic by eye |
| Treble | 100k | 100k | Potentiometer | Bass, mid and treble EQ: ; read from the schematic by eye |
| 50Hz | 100k | 100k | Potentiometer | Five-band graphic EQ (50Hz-12.8kHz): band slider; read from the schematic by eye |
| 200Hz | 100k | 100k | Potentiometer | Five-band graphic EQ (50Hz-12.8kHz): band slider; read from the schematic by eye |
| 800Hz | 100k | 100k | Potentiometer | Five-band graphic EQ (50Hz-12.8kHz): band slider; read from the schematic by eye |
| 3.2KHz | 100k | 100k | Potentiometer | Five-band graphic EQ (50Hz-12.8kHz): band slider; read from the schematic by eye |
| 12.8KHz | 100k | 100k | Potentiometer | Five-band graphic EQ (50Hz-12.8kHz): band slider; read from the schematic by eye |
| VS-Bass | 100K | 100k | Potentiometer | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye |
| VS-Treb | 100K | 100k | Potentiometer | Bass/mid/treble EQ with variable shelf mid: ; read from the schematic by eye |
| VS-Mid Freq | A50K | A50k | Potentiometer | Bass/mid/treble EQ with variable shelf mid: dual gang, log; read from the schematic by eye |
| ×1 | B5k | B5k | Potentiometer | Bass/mid/treble EQ with variable shelf mid: mid cut/boost, lin; read from the schematic by eye |
| Low Freq | A50K | A50k | Potentiometer | Three-band EQ with variable shelf frequency: dual gang, log; read from the schematic by eye |
| Mid Freq | A50K | A50k | Potentiometer | Three-band EQ with variable shelf frequency: dual gang, log; read from the schematic by eye |
| High Freq | A50K | A50k | Potentiometer | Three-band EQ with variable shelf frequency: dual gang, log; read from the schematic by eye |
| ×3 | B5k | B5k | Potentiometer | Three-band EQ with variable shelf frequency: cut/boost, one per band, lin; read from the schematic by eye |