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Michael Black[_2_] Michael Black[_2_] is offline
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Default Capacitor Shield ?

On Sun, 8 Nov 2015, Ron D. wrote:


No real clue except an explosive shield.

There is a polarity on non-polarized caps. It is suggested that the
"foil side" go to the low Z point in the circuit. Typically this would
be important in a vacuum tube circuit. Not all caps are marked alike,
"Foil side" used to be a common marking.

Wait. That sort of "polarity" had nothing to do with DC voltage, but
about which side went to ground. And it was because paper capacitors were
so large, and could be a source of noise pickup if the outer side wasn't
going to ground.

It never really came up because by the time of transistors, the paper
capacitors had mostly faded away.

Michael