The PSU is a bare chassis and needs to be put in a box of some sort for safety. The PSU gets warm so the box needs to have some ventilation and not too close fitting. Suggest you buy the PSU and take it to Radio Shack to find a Project Box to fit. Preferably it should be metal to reduce RF but plastic is easier to work with and will do. You will need to attach it to the box (three nuts and bolts will be fine) but you will also need three spacers to keep the PSU with some air around it. Radio Shack will sell you some suitable 2" bolts and some 1/2" spacers. So bolt through base of box, spacer, PSU and nut to secure. Repeat with other two.
Get a mains lead and solder to the correct tabs on the PSU (live, neutral and earth). Take a two wire lead and solder it to the PSU output (marked 0v and +5v). The other end needs a minature power plug (Radio Shack again) so take the SB3 with you and ask them to find one that will fit (it is a 2.5mm type) if you are unsure. If you do not feel confident soldering the minature plug to the lead the easiest way is to buy a made up lead with the correct plug on the end, chop the other end off and solder to the 5v PSU terminals. Ideally you should put a 250ma fuse on the mains side so get a fuse and holder while you are at Radio Shack. You will need to drill 5 or 6 holes and solder 5 or 7 joints depending on whether you fit a fuse. So the live wire will go to the fuse holder and another length of wire to L terminal on the PSU. Neutral to the other tab and earth to somewhere on the metal chassis. Before connecting the completed PSU to the SB3 you really should put a voltmeter ($16 Radio Shack) across the 5v output to verify it is working correctly and the polarity is right; the -ve will be on the outer metal part of the plug, the +ve in the centre. There will also be a slotted adjustment on the PSU so you can set the voltage to 5.0 if it is slightly too high or low. There is a picture of the one I built on the Forum so you get the idea. Mine took a couple of hours to build but I had to fit an IEC socket and I used a metal box. If you use plastic and forget about the IEC socket you should be up and running in less than an hour. Remember - check the output with the multimeter for voltage and polarity before connecting it up to the SB3! Regards David PS Did I mention to check the output with a meter before connecting it to the SB3? -- Heuer ------------------------------------------------------------------------ Heuer's Profile: http://forums.slimdevices.com/member.php?userid=2543 View this thread: http://forums.slimdevices.com/showthread.php?t=19452 _______________________________________________ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/lists/listinfo/audiophiles
