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Old 10-21-2017, 10:34 AM
old_coot88 old_coot88 is offline
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Quote:
Originally Posted by Electronic M View Post
....The 'outside foil' band on the end of paper caps is traditionally connected to ground. The outside foil wraps around the cap shielding it (thus why you want to connect it to ground...
Not necessarily. If shielding is your concern, the outside foil needs to go to the lower impedance side, which is not always ground. For example, the coupling cap from plate of a 1st audio stage to grid of output stage. The outside foil goes to the plate because it's lower impedance (albeit higher DC voltage) than the grid.

Signal impedance is what you're shielding for.
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