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Is that a sinewave your inputting , or white or pink noise, as I can’t tell. I have just connected the both ends of the caps to the oscilloscope probe and kept the capacitor between my fingers: this is what I have understood from the video. Maybe I am wrong, but it seems to me that there is no sine...

After having spent hours to read different forums and Youtube videos, I have found this post that seems very informative. When I use my scope, I can't get to perfect sinewaves that you get on your laptop: I get erratic measures like these ones: A given cap orientation: SDS00001.png and the reversed ...