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I have a very basic question for the professionals here, but I am having a small issue with my parallel LC circuit. I have an inductor that is 6.425mH, a capacitor that is 217uF (it is two 470uF aluminum electrolytic caps connected in series to make one non-polar 217uF cap). I am supplying the circuit with 120 Hz pulsating DC voltage of roughly 6.3 volts and 2.8 amps. The supply comes from a 60hz AC supply from a small transformer through a bridge rectifier. The problem being I am not getting a resonance effect at all. Based on my online calculations I should have a circuit impedance of roughly 17 to 20 ohms. But it is staying around 2 to 3 ohms. That tells me the circuit isn't resonating. How can I get this circuit to resonate. I know the values don't exactly match 120hz, but there should be some resonance effect.