You need the widest pF sweep on this bench and the 40pF cap just isn't reaching. This brown trimmer runs 9.8 to 50pF, same 20–200 gr/cm torque, so your final tuning turn is deliberate, not a guess. Rated 50V DC working, 110V DC withstand, and stable from –30°C to +85°C. N1200 temperature coefficient means the value you set at 22°C is still the value at 60°C in a hot cabinet. Turn it to spec, lock it, close the lid
| brand | Jaycar |
| capacitance_range | 9.8pF – 50pF |
| working_voltage | 50V DC |
| withstand_voltage | 110V DC |
| insulation_resistance | >10⁴ MΩ min @ 250V DC |
| operating_temperature | –30°C to +85°C |
| turning_torque | 20–200 gr/cm |
| temperature_coefficient | N1200 |
| colour | Brown |
| category | Electronics & Components |
| subcategory | Electronic Components |
