Here are some conclusions I have drawn from this project: 5 volts at 2 amps is a hefty figure for a regular wallwart power supply, specially if good regulation is desired. It's no wonder Slim Devices chose a switcher for this application. A comparable linear supply would have been larger than the Squeezebox itself and very expensive!
If you are using a linear wallwart and it runs cool to the touch, then you have less than ideal regulation. My DIY power supply puts out 5.02 volts loaded, which is pretty good regulation. It does run quite warm despite the large transformer, regulator heatsinks and metal enclosure. If absolutely cool operation is desired the dimensions of the transformer would be cost prohibitive in my opinion. 5 volts at 2 amps are needed mainly because of the Vacuum Flourescent Display (VFD). The power requirements are very similar to standard tube filaments. Tube equipment trannies also run quite warm in operation since most of the current drain comes from the filament windings. -- crooner Squeezebox 3 with DIY Linear Power Supply Lite Audio DAC60 tube DAC Pioneer SX-1980 Vandersteen 2Ce Signature Vandersteen 2W ------------------------------------------------------------------------ crooner's Profile: http://forums.slimdevices.com/member.php?userid=3379 View this thread: http://forums.slimdevices.com/showthread.php?t=21505 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
