Parts · Transistors
J309
5 circuits use this part. Listed as: JFET transistor, N-channel; Transistor-TO-92 Inline Wide.
Substitutes N-channel JFET
Matched on material, polarity and the limits below from the transistor parameter database. Pinouts and packages are not in that data: check the datasheet before you drop one in, and expect gain to change the sound.
This part
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| J309 | 4 V | 30 mA | 25 V | 0.625 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| MPF4393 | 30 mA | 30 V | 0.35 W | 13 | |
| J113 | 50 mA | 35 V | 0.4 W | 26 | |
| J112 | 50 mA | 35 V | 0.4 W | 4 | |
| J111 | 50 mA | 35 V | 0.4 W | 1 | |
| 2N5459 | 4.5 V | 16 mA | 25 V | 0.625 W | 2 |
| 2SK246 | 14 mA | 50 V | 0.3 W | 2 | |
| MPF102 | 7.5 V | 20 mA | 25 V | 0.35 W | 4 |
| 2N3819 | 8 V | 50 mA | 25 V | 0.35 W | 4 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| PN5434 | 4 V | 30 mA | 25 V | 0.35 W |
| 2SK146 | 30 mA | 40 V | 0.6 W | |
| 2SK147 | 30 mA | 40 V | 0.6 W | |
| 2SK363 | 30 mA | 40 V | 0.4 W | |
| 2SK163 | 30 mA | 50 V | 0.4 W | |
| 2SK523 | 30 mA | 50 V | 0.4 W | |
| 2SK533 | 30 mA | 50 V | 0.4 W | |
| BF861C | 25 mA | 25 V | 0.25 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| BBC ONE J309 | DUMBLE BBC-1 / JHS NOTADÜMBLË Clean Channel | Boost | Five Cats Pedals | 1590B | 3 | £4.00 | 18 | |
| BBC Dumb J309 | BBC-1 / JHS Fumble | Boost | Fuzz Dog | 1590B | 1 | £24.00 | 14 | |
| NostalgiTone FrontStage: Boutique Dumble J309 | Dumble | Boost | GuitarPCB | 125B | 2 | $7.95 out | 13 | |
| Fumble Boost J309 | DUMBLE BBC-1 / JHS FUMBLE Boost | Boost | PedalPCB | 125B | 2 | $10.00 | 16 | |
| Cast Sheep J309 | JHS Fumble | Boost | Sheepylove | — | 3 | €5.00 | 16 |