Posted by Wayne Parham [ 65.69.120.160 ] on March 04, 2005 at 00:50:38:
In Reply to: Too late posted by colinhester on March 03, 2005 at 23:01:36:
When you use a full-wave rectifier, the power supply ripple is always double the line frequency. If there is noise coupled into a signal line, it could be amplified to produce 60Hz hum. But if it's power supply ripple, and it probably is, then it's 120Hz.
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