Main problem of linear power supply is switching at the max voltage when diodes become polarized in opposite direction. Current drops rapidly to zero and for a moment diode conducts in opposite direction to snap back to zero. What you need is a so called "Soft" diode - a fast diode with slow recovery time like Hexfreds. Diodes that snap back too fast produce ringing that is polluting supply voltage and can couple to any LC circuit. I would not mix diodes. Schottkies have lower forward drop voltage and usually much lower max. reverse voltage.
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