Schematic says 3.9 ohms. Your parts bin doesn't have them. You don't need a three-week backorder to finish the circuit you're debugging right now. These Jaycar carbon film resistors (code 3R9) give you that exact value at a quarter watt, stable enough for audio coupling, current shunting, or bias networks. Eight in the pack means you can populate a whole board section without hunting for a single spare
| brand | Jaycar |
| resistance_ohms | 3.9 |
| eia_code | 3R9 |
| power_rating_watts | 0.25 |
| construction_type | Carbon Film |
| pack_quantity | 8 |
| category | Electronics & Components |
| subcategory | Electronic Components |
