125B · 2 knobs
Ross PhaserVerified
Based on the Ross Phaser· 3 other boards clone it
From the post
Yes, Modulation Monday is back with the Ross Phaser. It's not for the feint of heart, but doesn't require any JFETs, matched or otherwise. Instead it uses OTAs with 3, LM13700N (one for the LFO, two for the audio path). Should fit nicely in a 125B with top mounted jacks. Schematic for reference.
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 24 rows
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Check before you build · 1 value the reader of this layout was not sure of
- 3.3nF above the top-right LM13700: printed clearly as 3.3nF but drawn as a round can like an electrolytic, unlike the other four 3.3nF (film)
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| ×1 | 1K | 1k | read from the layout by eye | |
| ×4 | 1.8K | 1.8k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×8 | 10K | 10k | read from the layout by eye | |
| ×1 | 15K | 15k | read from the layout by eye | |
| ×12 | 27K | 27k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×2 | 270K | 270k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×5 | 3.3nF | 3.3n | one of the five is drawn as a round can; read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×3 | 1uF | 1u | drawn as box film capacitors; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ×2 | 1N4148 | 1N4148 | read from the layout by eye | |
| ICs 2 | ||||
| ×3 | LM13700 | LM13700 | read from the layout by eye | |
| ×1 | 4558 | 4558 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Intensity | C500K | C500k | Potentiometer | read from the layout by eye |
| Rate | C500K | C500k | Potentiometer | read from the layout by eye |
Other boards based on the Ross Phaser
- Ross Phaser Experimentalists Anonymous
- Ross Phaser Tagboard Effects
- Ross Phaser Tonepad · $14.00