Parts · Transistors
J177
Si P-ch JFET TO-92 TH.9 circuits use this part. Listed as: Transistor MMBF J177; Transistor J177.
Datasheet · from onsemi.com
Substitutes P-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 |
|---|---|---|---|---|
| J177 | 2.5 V | 20 mA | 30 V | 0.35 W |
Used on other boards here
| Part | Vgs max | Id max | Vds | Pd | Boards |
|---|---|---|---|---|---|
| 2N5116 | 25 mA | 30 V | 0.5 W | 2 | |
| J176 | 4.5 V | 25 mA | 30 V | 0.35 W | 1 |
| 2N5461 | 4.5 V | 9 mA | 40 V | 0.35 W | 1 |
| 2N5460 | 4 V | 5 mA | 40 V | 0.35 W | 1 |
| J175 | 6 V | 60 mA | 30 V | 0.35 W | 5 |
Closest by the numbers
| Part | Vgs max | Id max | Vds | Pd |
|---|---|---|---|---|
| 2SJ109 | 20 mA | 30 V | 0.2 W | |
| 2SJ108 | 20 mA | 25 V | 0.2 W | |
| 2SJ74 | 20 mA | 25 V | 0.4 W | |
| 2SJ103 | 14 mA | 50 V | 0.3 W | |
| 2SJ105 | 14 mA | 50 V | 0.2 W | |
| 2SJ106 | 14 mA | 50 V | 0.15 W | |
| 2SJ75 | 20 mA | 25 V | 0.4 W | |
| 2SJ164 | 3.5 V | 20 mA | 65 V | 0.3 W |
| Faceplate | Circuit | Based on | Category | Vendor | Box | Knobs | Price | BOM |
|---|---|---|---|---|---|---|---|---|
| Brown Cat Preamp v.3 BC547C · BC550C · BC557C · IRF740 Friedman BE50/BE100 preamp · 1590DD | Friedman BE50/BE100 preamp | Preamp / Amp-in-a-box | HotKits | 1590DD | 14 | $28.00 | 75 | |
| Dopamine Preamp BC547C · BC557C · IRF740 · J177 1590BB2 | — | Preamp / Amp-in-a-box | HotKits | 1590BB2 | 7 | $14.00 | 52 | |
| Old Sparky Preamp BC547 · BC557 · BF245 · IPA60R180P7S Friedman BE Deluxe & Small Box preamp · 1590XX | Friedman BE Deluxe & Small Box preamp | Preamp / Amp-in-a-box | HotKits | 1590XX | 9 | $27.00 | 63 | |
| Reef Razor Preamp BC547C · BC557C · IRF740 · J112 Bogner Snorkler preamp · 1590XX | Bogner Snorkler preamp | Preamp / Amp-in-a-box | HotKits | 1590XX | 9 | $28.00 | 61 | |
| Shark Preamp v.2 BC547C · BC557C · IRF740 · J177 ENGL E530 · 1590XX | ENGL E530 | Preamp / Amp-in-a-box | HotKits | 1590XX | 9 | — out | 59 | |
| SupraLead Preamp BC547C · BC557C · IRF740 · J177 Marshall Super Lead 1959 · 1590DD | Marshall Super Lead 1959 | Preamp / Amp-in-a-box | HotKits | 1590DD | 12 | $30.00 | 58 | |
| Thunderbird Preamp BC847 · J111 · J177 · J201 Lionsound 16.0 Fire Angel · 1590BB | Lionsound 16.0 Fire Angel | Preamp / Amp-in-a-box | HotKits | 1590BB | 7 | $10.00 | 59 | |
| Wildhoney Preamp v.3 BC547C · BC557C · IRF740 · J112 Soldano SLO preamp · 1590XX | Soldano SLO preamp | Preamp / Amp-in-a-box | HotKits | 1590XX | 9 | — out | 65 | |
| Fuzz Phase 2N5089 · J177 Soviet schematics · 1590BB | Soviet schematics | Phaser | PCB Guitar Mania | 1590BB | 7 | €11.90 out | 80 |