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25th February 2004, 12:29 AM
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#1 |
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diyAudio Member
Join Date: Feb 2004
Location: Pittsburgh
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Power Supply Question
How do amplifiers produce quality results using power supplies with only a bridge rectifier and filter caps? I know that the filter caps fill in the low spots in the rectified wave, but not completely... as the caps bleed off voltage to the output, their total charge falls, and can be calcuated, but I don't want to go read my textbooks right now to dig up the equations.
Anyways, since the DC won't be perfect DC if you look at it on a scope, how does the output signal of an amp powered by such a power supply not have a faint 120hz hum? Thanks. -Adam |
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