Silly question. Just make sure you have a thick enough wire and voltage changes will be tiny. And, unlike many here who worry too much about it, remember your power cord is the last 6 feet of miles and miles of electricity company cable bringing your power from the power station, plus a few 10s of feet in your home wiring. Don't obsess. |
@jea48 Yes, but this happens all the time. The capacitor's job is to integrate the incoming peak voltages over time. When idling and fully charged, the window of time when the rectifier is conducting is already pretty narrow. It only conducts on the peaks of the 60Hz waveform. The capacitors charge, and then, until the next cycle, continue to discharge. Hence the natural ripple seen there. If the mains VAC is now a little lower, it may not charge at all, or for a shorter period of time. So the output of the power supply is in constant flux, especially if you consider how it discharges during musical playback of signals much faster than 60 Hz. Kind of amazing it works at all. :) |
