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Agree with Lee of Omaha

Photoflash caps have low inducatance and fast discharge, but are NOT good for filtering large amounts of ripple or current. Use a good computer grade for initial filtering and photoflash for decoupling (with a film bypass), where they work very well. I measured some 500mfd/500vdc photoflash caps that had less than 40 miliohms ESR--cn't get that in an electrolytic of that size. Film caps can have even lower ESR, but can't store nearly as much energy.


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  • Agree with Lee of Omaha - garymuffley 17:15:15 04/23/17 (0)

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