In the resonant circuit, capacitors such as mica, ceramics, and organic films can be used. Ceramic capacitors and mica capacitors should be used in high-frequency and high-voltage circuits. Electrolytic capacitors should be used in power supply filtering and decoupling circuits. When used as DC isolation, paper, polyester, mica, and electrolytic capacitors can be used. When used in a tuned loop, air dielectric or small sealed variable capacitors can be used. When selecting, you should also pay attention to the lead form of the capacitor. Welding lug lead-out, wiring lead-out, screw lead-out, etc. can be selected according to actual needs to adapt to the jack requirements of the line.
The rated voltage of the capacitor should be higher than the actual working voltage. For circuits with poor working voltage stability, a larger margin can be left to ensure that the capacitor is not damaged or broken down.
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