Re: [SlimDevices: Touch] Linear Power Supplies
Well thank you for posting the link. I didn't know the file name and had no luck with other keywords. I'm still considering what to use. The original ps burned up, a generic 4A switcher only lasted a month, now I'm using a little better (I hope) 6A switcher while I decide whether to use a linear supply. Squeezebox Touch Notebook serving .3T library Control: Samsung phone or tablet + SqueezeCommander, Duet remote Guy48065's Profile: http://forums.slimdevices.com/member.php?userid=38659 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Linear Power Supplies
pelliott321 wrote: > What's the deal about this is it some big secret or something. No, it's just that John's original link no longer works, and there had been a few requests for it. It wasn't hard to find, but I thought I would point it out anyway, having just found it myself. cdmackay's Profile: http://forums.slimdevices.com/member.php?userid=24816 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Linear Power Supplies
tcutting wrote: > I looked at the schematic, and was surprised to see it seemed like > almost a textbook linear PS. I think, as you noted, the main difference > is he does some filtering around the main transformer/rectifier bridge > to clean-up the voltage presented to the regulator IC. It's also an exceptionally quiet regulator. It really is in a league of its own at the moment. And the RC filter on the transformer is important too, to get rid of noise from the transformer itself. It's just a very solid - if simple - design. Receiver stuck at blue LED state after reboot? Please vote for bug '17462' (http://bugs.slimdevices.com/show_bug.cgi?id=17462) paulster's Profile: http://forums.slimdevices.com/member.php?userid=23073 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Linear Power Supplies
Guy48065 wrote: > Swenson's linear supply is just a basic 3-pin regulator chip? Is there > something special about the LT1084 that's a big improvement over a > LM317-vintage regulator? Yes . But the thing when he designed this was the primary inductance "L1" a chunky 10mH thing this makes it a LC filtered supply on the primary side before the regulator . The supply is not as dirty to the network as many others . Wonder if his write up on the design idea is still on this forum ? Suppose the Touch has a bunch of internal switchers and regulators anyway . Point of the exercise is that it's nothing magical with power supplies . A linear supply can also be dirty to the network just as switch modes can . This design fixes some of that but the 5 V side could probably have even better regulators if one wants to make it a project of some kind . If it's good enough it's ok regardless of topology switch mode or linear . This design is not super expensive . If I got it rigth ? Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3 sub. Bedroom/Office: Boom Kitchen: Touch + powered Fostex PM0.4 Misc use: Radio (with battery) iPad1 with iPengHD & SqueezePad (spares Touch, SB3, reciever ,controller ) server HP proliant micro server N36L with ClearOS Linux http://people.xiph.org/~xiphmont/demo/neil-young.html Mnyb's Profile: http://forums.slimdevices.com/member.php?userid=4143 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Linear Power Supplies
Swenson's linear supply is just a basic 3-pin regulator chip? Is there something special about the LT1084 that's a big improvement over a LM317-vintage regulator? Squeezebox Touch Notebook serving .3T library Control: Samsung phone or tablet + SqueezeCommander, Duet remote Guy48065's Profile: http://forums.slimdevices.com/member.php?userid=38659 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Linear Power Supplies
pelliott321 wrote: > What's the deal about this is it some big secret or something. no. not a secret or big deal at all. Just a person's schematics for a linear power supply that may or may not be better than any other powersupply. If you're using a TOUCH for example, the likelihood of improving its audio with a non-stock powersupply is about zero. *Home:* VortexBox 4TB (2.3) > LMS 7.8 > Transporter, Touch, Boom, Radio (all ethernet) *Cottage:* VBA 3TB (2.3) > LMS 7.8 > Touch > Benchmark DAC I, Boom, Radio w/Battery (all ethernet except Radio) *Office:* Win8(64) > LMS 7.9 > Squeezelite *Spares:* Touch(3), Radio(3), Boom, SB3, CONTROLLER *Controllers:* iPhone6 & iPadAir2 (iPeng8 & Squeezepad), CONTROLLER, or SqueezePlay 7.8 on Win7(64) laptop *Files:* ripping: dbpoweramp > FLAC; post-rip: mp3tag, PerfectTunes; Streaming: Spotify garym's Profile: http://forums.slimdevices.com/member.php?userid=17325 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
Re: [SlimDevices: Touch] Linear Power Supplies
cdmackay wrote: > For those asking for a working link to John's schematic - if you Google > search for the filename itself - SB_5V.GIF - you should find it, in a CA > forum post. What's the deal about this is it some big secret or something. pelliott321's Profile: http://forums.slimdevices.com/member.php?userid=5 View this thread: http://forums.slimdevices.com/showthread.php?t=82648 ___ Touch mailing list Touch@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/touch
