Kuro wrote: > I'm using the newer PhiHong EU Efficiency Level V SMPS for my SBT. It > does have faster transient response and less noise being sent back to > the AC. Since the switching freq is higher, it is also easier to > filter. My PS Audio PPP is very effective in nuking the AC noise from > this Level V SMPS, but not with the SBT's stock SMPS. > > The sound is better with this SMPS than with the stock one from my SBT > (also OEM'ed from PhiHong). The only problem is that PhiHong typically > use 2.1mm pin barrel plug where as the SBT has 2.5mm. So the SMPS is > not directly interchangeable with the SMPS from the SBT even though they > look identically. > > I made a pigtail converting the 2.1mm plug to a 2.5mm and in the > process, I put a 1uF SMD film cap inside the plug right across GND and > +5V to kill off some more high freq noise. That seems to help a bit. > > I highly recommend using a barrel power connector and a Level V SMPS > brick for this project.
Thanks Kuro, that's the type of info I'm interested in. I see the PSAA15W brick at digikey for $11.24, is this what you are talking about? That brings up an interesting question, do we go with a wallwart with interchangeable pin adapters, or a brick which uses a standard cord connector and let the user get the right cord. That PSAA15W brick looks like a good choice for this project. It seems to be widely available. I have been trying out different plugs and devices with 2.1 or 2.5 sizes and at least with what I have a 2.5 plug will usually work fine with a 2.1 jack, but the 2.1 plug does not work with a 2.5 jack. So if we put a 2.1 jack on the board, then either a 2.1 or 2.5 plug should work. That seems like the most compatible situation I can come up with. John S. ------------------------------------------------------------------------ JohnSwenson's Profile: http://forums.slimdevices.com/member.php?userid=5974 View this thread: http://forums.slimdevices.com/showthread.php?t=97881 _______________________________________________ discuss mailing list discuss@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/discuss
