That 3.9pF on your layout isn't a 3.3 and it's not a 4.7. You need the exact value, and you need it before the next test run. These Jaycar ceramic capacitors are fixed at 3.9pF, rated to 50VDC, and non-polarized so orientation isn't a question mark. Two in the pack. One goes in, one stays in the box. Build on
| brand | Jaycar |
| capacitance | 3.9pF |
| voltage_rating | 50VDC |
| type | Ceramic Capacitor |
| polarity | Non-polarized |
| pack_size | 2 |
| dielectric | Ceramic |
| category | Electronics & Components > Electronic Components |