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RE: Odd harmonic ringing?

Posted by rick_m on May 27, 2007 at 11:08:01:
Hi Alan,

I appreciate the info and am trying diligently to understand it. My difficulty may be with the terminology as I think of "noise", "RF", and "harmonics" as largely separate things. Let me try this in Rick-speak and see if I'm close...

Is "leakage from the first shunt capacitor in each component" the voltage imposed upon the power line at the outlet due to processes within the component?

Does this statement describe the resonance situation? "The process of using L/C filters to reduce susceptibility and emissions can have the side effect of resonating at one of the harmonics of the power line which causes problems".

It would help my understanding a great deal to know within an order of magnitude the frequency range where you are seeing the ringing. It sounds like you've identified a band that causes the worst problems.

Last winter I tried connecting a honking transformer as a choke to my study stereo and heard no difference at all. Which tells me nearly nothing. The choke may not have had the right attributes, the system might not be susceptible to the effect, who knows?

Thanks, Rick