Parts · Transistors
2N404A
Ge PNP BJT TH.18 circuits use this part. Listed as: Germanium NPN transistor; Germanium transistor, PNP; Semiconductors; TO-92 Inline Wide-large-solderpads; Transistor, PNP germanium.
Datasheet · archived copy from Central Semiconductor; the part is discontinued and the maker no longer publishes it
Substitutes Ge PNP 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 |
|---|---|---|---|---|---|
| 2N404A | 35 | 150 mA | 0.15 W | 4 MHz |
Used on other boards here
| Part | hFE min | Vce | Ic | Pc | fT | Boards |
|---|---|---|---|---|---|---|
| MA287 | 30 | 10 V | 200 mA | 0.175 W | 1 | |
| MP20A | 50 | 20 V | 300 mA | 0.15 W | 2 MHz | 1 |
| OC83N | 40 | 20 V | 1000 mA | 0.22 W | 1 MHz | 1 |
| MP41A | 50 | 30 V | 150 mA | 0.15 W | 1 MHz | 2 |
| NKT275 | 30 | 15 V | 250 mA | 0.2 W | 0.5 MHz | 13 |
| 2N1307 | 60 | 15 V | 300 mA | 0.15 W | 8 MHz | 6 |
| GT402D | 30 | 25 V | 500 mA | 0.6 W | 1 MHz | 2 |
| 2N1382 | 50 | 25 V | 200 mA | 0.25 W | 1 MHz | 1 |
Closest by the numbers
| Part | hFE min | Vce | Ic | Pc | fT |
|---|---|---|---|---|---|
| 2N1115 | 35 | 15 V | 125 mA | 0.15 W | 4 MHz |
| SFT227 | 35 | 24 V | 250 mA | 0.15 W | 4 MHz |
| 2N586 | 35 | 25 V | 250 mA | 0.25 W | |
| SFT298 | 35 | 20 V | 500 mA | 0.15 W | 6 MHz |
| 2N1447 | 35 | 25 V | 400 mA | 0.2 W | 3 MHz |
| 2N1305 | 40 | 20 V | 300 mA | 0.15 W | 4 MHz |
| 2N396A | 30 | 20 V | 200 mA | 0.15 W | 4 MHz |
| 2N450 | 30 | 12 V | 125 mA | 0.15 W | 4 MHz |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Particle Vintage Fuzz 2N3904 · 2N404A Interfax Harmonic Percolator · 125B | Interfax Harmonic Percolator | Fuzz | Aion FX | 125B | 3 | $12.50 | 32 | |
| Skywave Germanium Drive 2N404A · 2N5088 · LT1054 · LT1054CP Hudson Electronics Broadcast · 125B | Hudson Electronics Broadcast | Fuzz | Aion FX | 125B | 3 | $12.50 | 53 | |
| Harmonic Percolator - Albini Version Turret board2×6 2N3565 · 2N404A Interfax Harmonic Percolator · 1590BB | Interfax Harmonic Percolator | Fuzz | Amplified Parts | 1590BB | 2 | — | 15 | |
| Harmonic Percolator - Stock Version Turret board2×6 2N3565 · 2N404A Interfax Harmonic Percolator · 1590BB | Interfax Harmonic Percolator | Fuzz | Amplified Parts | 1590BB | 2 | — | 15 | |
| Interfax HP-1 Harmonic Percolator Vero15×9 Verified 2N3565 · 2N404A Interfax Harmonic Percolator | Interfax Harmonic Percolator | Distortion | Dirtbox Layouts | — | 2 | — | 16 | |
| Interfax HP-1 Harmonic Percolator MOJO layout Vero14×13 Unverified 2N3565 · 2N404A Interfax Harmonic Percolator | Interfax Harmonic Percolator | Fuzz | Dirtbox Layouts | — | 2 | — | 17 | |
| Red Witch Fuzz God 1 Vero14×12 Unverified 2N404A · BS170 Red Witch Fuzz God 1 | Red Witch Fuzz God 1 | Fuzz | Dirtbox Layouts | — | 4 | — | 20 | |
| Stephen Douglas Leona V1 Vero16×15 Verified 2N2904A · 2N404A · MAX1044 · TC1044 Stephen Douglas Leona V1 | Stephen Douglas Leona V1 | Overdrive | Dirtbox Layouts | — | 3 | — | 28 | |
| Harmonic Percolator Perfboard Verified 2N3565 · 2N404A Interfax Harmonic Percolator | Interfax Harmonic Percolator | Fuzz | Effects Layouts (blog) | — | 2 | — | 15 | |
| Percolate Me 2N3565 · 2N404A Interfax Harmonic Percolator · 1590B | Interfax Harmonic Percolator | Fuzz | Five Cats Pedals | 1590B | 2 | £4.00 | 19 | |
| PepperSpray 2N3565 · 2N404A Interfax Harmonic Percolator · 1590B | Interfax Harmonic Percolator | Fuzz | Madbean | 1590B | 2 | $10.00 | 20 | |
| PepperSpray 2N3965 · 2N404A Interfax Harmonic Percolator · 1590A | Interfax Harmonic Percolator | Other | Madbean | 1590A | 2 | — | 20 | |
| Faxe 2N3565 · 2N404A Interfax Harmonic Percolator | Interfax Harmonic Percolator | Fuzz | Moonn Electronics | — | 2 | €4.50 | 21 | |
| Germanium Percolator 2N3965 · 2N404A Interfax Harmonic Percolator · 1590B | Interfax Harmonic Percolator | Fuzz | PCB Guitar Mania | 1590B | 1 | €7.50 out | 20 | |
| Germanium Percolator Deluxe 2N3965 · 2N404A Interfax Harmonic Percolator · 125B | Interfax Harmonic Percolator | Fuzz | PCB Guitar Mania | 125B | 5 | €9.90 out | 31 | |
| Percolation Station 2N3565 · 2N404A Interfax Harmonic Percolator · 125B | Interfax Harmonic Percolator | Fuzz | PedalPCB | 125B | 2 | $8.00 | 19 | |
| Harmonic Percolator Vero Verified 2N3565 · 2N404A Interfax Harmonic Percolator | Interfax Harmonic Percolator | Fuzz | Tagboard Effects | — | 2 | — | 15 | |
| Harmonic Percolator Tagboard Verified 2N3565 · 2N404A Interfax Harmonic Percolator | Interfax Harmonic Percolator | Fuzz | Tagboard Effects | — | 2 | — | 13 |