Parts · Diodes
1N4149
Si Signal Diode DO-35 TH.1 circuit uses this part. Listed as: small signal diode 1n34a, 1n914, 1n456a, 1n5819 Any diode goo.
Datasheet · from onsemi.com
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 1), 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 |
|---|---|---|---|---|---|---|---|
| 1N4149 | 1 V @ 10 mA | 0.5 A | 100 V | 4 ns | 2 pF | DO-35 | 1 |
Low-capacitance (2 pF) 1N4148-class diode.
Alternatives
| Part | Vf | If max | Vr | trr | Cj | Package | Boards | Differs |
|---|---|---|---|---|---|---|---|---|
| 1N916 | 1 V @ 10 mA | 0.2 A | 100 V | 4 ns | 2 pF | DO-35 | 17 | Lower capacitance (2 pF) version of the 1N914. |
| 1N914 | 1 V @ 10 mA | 0.2 A | 100 V | 4 ns | 4 pF | DO-35 | 905 | Same die as the 1N4148; the B grade is specified at 0.62-0.72 V at 5 mA. |
| 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. |
| 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). | |
| 1N458A | 1 V @ 100 mA | 0.5 A | 150 V | DO-35 | 2 | Low-leakage 150 V glass diode (25 nA at 125 V). | ||
| 1N4148W | 0.715 V @ 1 mA | 0.3 A | 100 V | 4 ns | 2 pF | SOD-123 | 5 | SOD-123. Surface-mount 1N4148 in SOD-123. |
| 1N456 | 1 V @ 100 mA | 0.5 A | 30 V | DO-35 | 8 | Low-leakage 30 V glass diode (25 nA at 25 V) that clips much like a 1N4148. | ||
| MA856 | 1 V @ 100 mA | 0.1 A | 35 V | 2 pF | DO-34 | 18 | DO-34. A band-switching diode (MA2C856), discontinued; 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. |
| 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. |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Murdock Plus TL072 · TL072P · TLE2074 125B | — | Distortion | God City Instruments | 125B | 3 | $10.00 | 53 |