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RE: Where does the current come from?

Two things.

First, in my experience large value caps as the last element do not give me a sound I would call musical.

Second, your calculations for the choke only work for frequencies well below the self resonant frequency. (the SRF is typically 500hz - 2Khz)

2A... the inductance you are using for your calculations are at a specified frequency which is typically near line frequency and the inductance at higher frequencies is typically much lower.

2B... above the self resonant frequency the device becomes capacitive in nature which presents a dropping impedance as frequency continues to go up.

2C so essentially at low frequencies the choke is inductive. at self resonance it is resistive and at high frequencies it is capacitive.

this sorta makes things clear as mud huh :-)


dave


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