Parts · Transistors
KSP42
Si NPN BJT TO-92 TH.3 circuits use this part.
Substitutes Si NPN transistor
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 | hFE min | Vce | Ic | Pc | fT |
|---|---|---|---|---|---|
| KSP42 | 40 | 300 V | 500 mA | 0.625 W | 50 MHz |
Closest by the numbers
| Part | hFE min | Vce | Ic | Pc | fT |
|---|---|---|---|---|---|
| 2SC1752 | 40 | 300 V | 500 mA | 0.625 W | 50 MHz |
| MPSA42D | 40 | 300 V | 500 mA | 0.625 W | 50 MHz |
| MPSA42I | 40 | 300 V | 500 mA | 0.625 W | 50 MHz |
| BF844 | 40 | 400 V | 500 mA | 0.625 W | 50 MHz |
| BF845 | 40 | 400 V | 500 mA | 0.625 W | 50 MHz |
| MPSA44-BK | 40 | 400 V | 300 mA | 0.625 W | |
| 2N6516 | 40 | 300 V | 500 mA | 0.625 W | 40 MHz |
| BSS72 | 40 | 250 V | 500 mA | 0.5 W | 50 MHz |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| DAM Fuzzrong FR-70 Vero13×9 Verified 2N4401 · KSP42 DAM Fuzzrong FR-70 | DAM Fuzzrong FR-70 | Fuzz | Dirtbox Layouts | — | 2 | — | 14 | |
| D*A*M FR-70 FuzzRong Perfboard Verified 2N4401 · KSP42 D*A*M FR-70 FuzzRong · 1590A | D*A*M FR-70 FuzzRong | Fuzz | Effects Layouts (blog) | 1590A | 2 | — | 15 | |
| DAM FR70 FuzzRong Vero17×7 Verified 2N4401 · KSP42 D*A*M FR-70 FuzzRong | D*A*M FR-70 FuzzRong | Fuzz | Tagboard Effects | — | 2 | — | 14 |