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It's still got some funny stuff going on, but that's been since it was new - the original builder tried to correct those issues.

It's still got some funny stuff going on, but that's been since it was new - the original builder tried to correct those issues.

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[–] • 1 pt

I know but it always triggers my OCD.

[–] • 1 pt

I did think about that but couldn't find any reason to check for that particular property with these parts, and I don't trust that method he's using.

Now, if I had something with +1kV on the plate, like the 1600VDC filters in a scope I have in the queue, sure. Those will be installed in a particular direction, even though they're only 0.1uF parts. 154VDC coming off the VR150? Yah, no need.

[–] • 1 pt

and I don't trust that method he's using.

Why not?

[–] • 1 pt

He's changing the capacitance of the part by touching it. Depending on how well the device is wound, and how the outer coatings are applied, you could be changing that capacitance simply by having a spot that's slightly different in the capacitor's formation - this could give you a false positive, especially if you're using something with a thick shell like orange drops.

99% of the parts you use are probably going to register fine with this method, but mission-critical stuff would need to be qualified with a more scientific method, or marked by the OEM for foil/film ends.

You're never going to be touching those parts, however - so for most applications what he's doing doesn't really matter.