12-01-2018, 12:33 PM
Yes, 3-prong cord will do the same as Y-caps (chassis to lines). Its just that the option wasn't available at the time.
However X-cap (from L to N) does help. If using large values (0.1uF to 1uF, which is unnecessary and is typically used for switching supplies to filter out the outgoing, not incoming, noise) installed between the outlet and the power switch then a bleeding resistor (200K or so) is a good idea, abd so is a NTC thermistor of a few Ohms cold resistance.
Otherwise 10-30nF is quite enough.
Use ONLY X or XY rated caps.
PS. Whether it improves the performance or not, depends on your Mains characteristics. Won't hurt anyway.
However X-cap (from L to N) does help. If using large values (0.1uF to 1uF, which is unnecessary and is typically used for switching supplies to filter out the outgoing, not incoming, noise) installed between the outlet and the power switch then a bleeding resistor (200K or so) is a good idea, abd so is a NTC thermistor of a few Ohms cold resistance.
Otherwise 10-30nF is quite enough.
Use ONLY X or XY rated caps.
PS. Whether it improves the performance or not, depends on your Mains characteristics. Won't hurt anyway.
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