crooner;197353 Wrote: > Well, the Unifive SMPS has a floating ground for one thing. The tiny > plastic encapsulated design is not grounded to the AC line. Some > parasitic noise is to be expected of this. > > Also, given the small size no actual shielding is employed to reduce > RFI emissions. >
So you're saying you don't have numbers... The PS meets regulatory requirements for EMI, shielded or not, or they couldn't ship it with the SB. Are you concerned about RF radiated into the SB from the power supply, noise put on the power lines finding its way into other equipment, or noise on the DC output of the supply? Radiated power would be very low since the supply can only supply 5V at 1.2A. It is probably 90% efficient which means that power input is only about 60mW higher than power out. Most of the excess power goes into heat, so there's very little left to radiate into other electronics. All this silliness about power supplies is getting old. The external switcher, remote from the SB as it is, is far less likely to cause problems than the SB internal switcher that provides HV to the display AND feeds the analog circuit regulators. Slimdevices own measurements have proven it. The horse is dead already. You can stop beating it anytime now. TD -- tyler_durden ------------------------------------------------------------------------ tyler_durden's Profile: http://forums.slimdevices.com/member.php?userid=2701 View this thread: http://forums.slimdevices.com/showthread.php?t=34749 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
