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Old 20th November 2004, 02:32 AM   #1
serengetiplains is offline serengetiplains  Canada
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Default PSU Question

Can someone explain to me what function a small capacitor, 1uF say, on the input of an otherwise choke-input performs? I understand the cap to reduce voltage gradients in the inductor? Where do those high voltages come from? Why is it desireable to reduce them? Appreciate any advice.

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Old 20th November 2004, 03:22 AM   #2
SHiFTY is offline SHiFTY  New Zealand
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Often it is to stop the choke physically buzzing, they dont like the ripply DC much.

Sometimes its also to lift the B+ a little.
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