What are the precautions when adjusting capacitance?

Use of appropriate screwdriver according to the slot on the fine-tuning capacitor.

When an inappropriate or worn top screwdriver is used, it may be difficult to adjust the capacitance value.

Similarly, due to the effect of stray capacitance, use of screwdriver with tip as metal will also increase the difficulty of the adjustment.

A screwdriver with a ceramic tip should be used to adjust the capacitance.