Parts · Diodes
OA200
Si Signal Diode.3 circuits use this part.
Selector table · a row in a maker's catalog, not a full datasheet; the part is discontinued
Substitutes same kind
Diodes of the same kind; for clipping, the forward drop is what you hear. The figures are read off each part's datasheet (this one's from page 10), typical where the sheet gives a typical value, otherwise the maximum. Closest first; the last column says what differs. A different part can change the sound, and a circuit may lean on one particular figure, so read the build document's notes before you swap.
This part
| Part | Vf | If max | Vr | trr | Cj | Package | Boards |
|---|---|---|---|---|---|---|---|
| OA200 | 0.53 V @ 0.1 mA | 0.05 A | 50 V | 3 |
An early silicon-alloy diode with a 0.53 V drop at 0.1 mA, close to a 1N4148.
Alternatives
| Part | Vf | If max | Vr | trr | Cj | Package | Boards | Differs |
|---|---|---|---|---|---|---|---|---|
| 1S2473 | 0.92 V @ 100 mA | 0.11 A | 40 V | 1.5 ns | 1.5 pF | DO-35 | 11 | |
| MA856 | 1 V @ 100 mA | 0.1 A | 35 V | 2 pF | DO-34 | 18 | A band-switching diode (MA2C856), discontinued; Vf is only a 1 V maximum at 100 mA. | |
| MA150 | 0.95 V @ 100 mA | 0.1 A | 35 V | 10 ns | 0.9 pF | DO-35 | 13 | |
| BA482 | 1.2 V @ 100 mA | 0.1 A | 35 V | 0.8 pF | DO-34 | 10 | A VHF band-switching diode; Vf is only a 1.2 V maximum at 100 mA. | |
| BA282 | 1 V @ 100 mA | 0.1 A | 35 V | 1.5 pF | DO-35 | 8 | A VHF band-switching diode; Vf is only a 1 V maximum at 100 mA. | |
| 1S1588 | 1.3 V @ 100 mA | 0.12 A | 35 V | 4 ns | 3 pF | DO-35 | 56 | A 1N4148-class switching diode; Vf is only a 1.3 V maximum at 100 mA. |
| 1N914BWS | 0.72 V @ 5 mA | 0.15 A | 75 V | 4 ns | 4 pF | SOD-323 | 2 | Surface-mount 1N914B in the small SOD-323 package. |
| 1N457A | 1 V @ 20 mA | 0.2 A | 70 V | 8 pF | DO-35 | 1 | Low-leakage 70 V glass diode (25 nA at 60 V). | |
| 1N4148 | 1 V @ 10 mA | 0.15 A | 100 V | 4 ns | 4 pF | DO-35 | 2547 | Vf is a 1 V maximum at 10 mA; the sheet calls the 1N914 electrically equivalent. |
| 1N4448 | 0.72 V @ 5 mA | 0.15 A | 100 V | 4 ns | 4 pF | DO-35 | 5 | A 1N4148 with a tighter forward voltage spec (0.62-0.72 V at 5 mA). |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Aclam The Mocker Vero16×14 Verified BC547A Aclam The Mocker | Aclam The Mocker | Fuzz | Dirtbox Layouts | — | 3 | — | 24 | |
| Aclam The Mocker Perfboard Verified BC547A Aclam The Mocker · 1590B | Aclam The Mocker | Fuzz | Effects Layouts (blog) | 1590B | 3 | — | 25 | |
| BeatleVox BC547 Aclam The Mocker · 1590B | Aclam The Mocker | Fuzz | Fuzz Dog | 1590B | 3 | £33.60 | 35 |