Tauno Voipio wrote:

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The peak is definitely from the charge pulse from the rectifier. A
capacitor-input PSU charges only 5 to 10 % of the half-cycle time,
depending on the resistances and inductances in the charge path.



** Wrong on both claims.

The charging current pulse has the same duration as the rising part of the voltage waveform - about 15 to 30% of the half cycle period.

The bump is due to resistance in series with the capacitance - use a film cap and it disappears.




..... Phil