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How to Test...

One method comes to mind, but it requires fairly expensive test equipment. You could ground one end of the capacitor, then drive the other end from a 50 ohm RF generator. Wrap four or five turns of wire around the body of the cap and feed that to a spectrum analyzer. The cap will shunt most of the energy to ground, but not quite all. A spectrum analyzer with a floor of perhaps -100 or -120 dBC will be able to detect the difference between the cap with the foil grounded and with the foil "live." You might be able to accomplish the same thing at 100 kHz using a low-Z output audio generator, a high gain audio amplifier (at least 60 dB gain) and an oscilloscope.





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  • How to Test... - Triode_Kingdom 16:09:57 07/25/16 (1)

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