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In Reply to: RE: How large can the capacitance be in parallel AC filter? posted by dave789 on November 28, 2014 at 18:48:56
I think you want to know how small a capacitor should be in a filter. The idea is to get as close to a short to take the noise to ground reference.
Why not try a search for capacitive reactance and see if this better fits your needs.
Follow Ups:
The extreme in the direction you mentioned would be no extra capacitor at all. Just the parallel capacitance of the power cord remains.A company called AudioPrism makes parallel filters. Its more expensive parallel filter (
ACFX) has larger case than its less expensive parallel filter (Quietline).So I guess the more expensive filter has more capacitors inside, i.e. larger parallel capacitance value.
Of course, large capacitors are slow and thus need "small" bypass capacitors.
Edits: 11/29/14
nt
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