Parts · Transistors
J108
Si N-ch JFET TO-92 TH.1 circuit uses this part.
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 |
|---|---|---|---|---|
| J108 | 80 mA | 25 V | 0.4 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| 2N3956 | 4 V | 50 mA | 50 V | 0.25 W | 1 |
| 2N3954 | 4 V | 50 mA | 50 V | 0.25 W | 1 |
| 2N4859A | 10 V | 50 mA | 30 V | 0.36 W | 2 |
| J113 | 50 mA | 35 V | 0.4 W | 88 | |
| J112 | 50 mA | 35 V | 0.4 W | 24 | |
| J111 | 50 mA | 35 V | 0.4 W | 17 | |
| J310 | 50 mA | 25 V | 0.4 W | 1 | |
| J309 | 4 V | 30 mA | 25 V | 0.625 W | 8 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| BF247A | 4 V | 80 mA | 25 V | 0.35 W |
| J107 | 4.5 V | 100 mA | 25 V | 0.625 W |
| PN5433 | 9 V | 100 mA | 25 V | 0.35 W |
| 2SK1747 | 75 mA | 40 V | 0.4 W | |
| 2N6453 | 5 V | 50 mA | 20 V | 0.36 W |
| 2N6454 | 5 V | 50 mA | 20 V | 0.36 W |
| PN4861 | 4 V | 80 mA | 30 V | 0.625 W |
| BF246B | 4 V | 140 mA | 25 V | 0.625 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Empress Effects Distortion Vero28×28 Unverified 2N5089 · 7660S · 7660SCPA · J108 Empress Effects Distortion | Empress Effects Distortion | Distortion | Dirtbox Layouts | — | 4 | — | 50 |