Power Supply for Squeezebox Touch
- Thread starter Lar
- Start date
I wish every linear power supply was built like this. I don't know what he does for a living, but Mr. J. Swenson knows power supplies.
This power supply models quiet and it tests quiet when built. Thanks for pointing it out. I might go with a different transformer, possibly a Hammond 229Cxx where xx is voltage, but that has to do as much with availability as it does performance. It is fairly easy to substitute other regulators for different output voltages. Very, very nice indeed.
This power supply models quiet and it tests quiet when built. Thanks for pointing it out. I might go with a different transformer, possibly a Hammond 229Cxx where xx is voltage, but that has to do as much with availability as it does performance. It is fairly easy to substitute other regulators for different output voltages. Very, very nice indeed.
Sorry, no wonder, I now read the part where John Swenson explains his job responsibilities in the same thread: this is a power supply designed by someone who designs way more complicated power supplies for a living. You can make this a commerical design and never look back.
Not cheap, by the way, a nice transformer and the choke alone will set you back about $60 at single unit prices, but nothing that good is ever cheap. The size of C2 is a huge factor in the design and how about those 20A Schottky diodes in a 1A power supply. Those don't add much to the price either. Did you notice the three different kinds of Panasonic caps: FC, TSHA, FM, FM? This is almost too good to be true.
Not cheap, by the way, a nice transformer and the choke alone will set you back about $60 at single unit prices, but nothing that good is ever cheap. The size of C2 is a huge factor in the design and how about those 20A Schottky diodes in a 1A power supply. Those don't add much to the price either. Did you notice the three different kinds of Panasonic caps: FC, TSHA, FM, FM? This is almost too good to be true.
I dont know alot about the Squeezebox or this stuff in general, but wouldnt a kit like this work for it? ... http://www.amb.org/audio/sigma11/
I have a digital player that runs off a battery or a wall wart. The sound was noticeably better off the battery than compared to the wall wart although describing it is not my forte.
I built the sigma 11 using decent parts and was pleased to find that when powered by my completed project, I heard no difference between the battery and the power supply.
It wasnt a very expensive enterprise so was well worth it for the extended playing time. Again, I dont know if it is appropriate for the Squeezebox.
I have a digital player that runs off a battery or a wall wart. The sound was noticeably better off the battery than compared to the wall wart although describing it is not my forte.
I built the sigma 11 using decent parts and was pleased to find that when powered by my completed project, I heard no difference between the battery and the power supply.
It wasnt a very expensive enterprise so was well worth it for the extended playing time. Again, I dont know if it is appropriate for the Squeezebox.
If it was translated into a manual that looks like Doc`s i would build it, otherwise i`m lost. ):grufti said:I wish every linear power supply was built like this. I don't know what he does for a living, but Mr. J. Swenson knows power supplies.
This power supply models quiet and it tests quiet when built. Thanks for pointing it out. I might go with a different transformer, possibly a Hammond 229Cxx where xx is voltage, but that has to do as much with availability as it does performance. It is fairly easy to substitute other regulators for different output voltages. Very, very nice indeed.
Grainger49
New member
Thanks for posting this schematic. I'm saving it for projects that might need it.
The filter on the secondary side of the transformer, the RC, is a very nice touch. I think it functions like the old RRSF of Seduction and FP 2 circuits. It was a FP 2 upgrade that became a stock part of the Seduction's circuit. It absorbs the noise from reverse leakage of each diode.
Changing the transformer voltage and the regulator voltage would make this appropriate for all sorts of things (keeping in mind the cap voltage rating might need to change if you go above say 25V input). I'm wondering if the choke needs to change for anything but the circuit current rating.
The filter on the secondary side of the transformer, the RC, is a very nice touch. I think it functions like the old RRSF of Seduction and FP 2 circuits. It was a FP 2 upgrade that became a stock part of the Seduction's circuit. It absorbs the noise from reverse leakage of each diode.
Changing the transformer voltage and the regulator voltage would make this appropriate for all sorts of things (keeping in mind the cap voltage rating might need to change if you go above say 25V input). I'm wondering if the choke needs to change for anything but the circuit current rating.
Noskipallwd
New member
Lar,
Sorry I did not see this thread earlier, there is a DIY ps for the Squeezebox at www.teddypardo.com. I have not built or used it but I do know a few people that like it on their system.
Cheers,
Shawn
Sorry I did not see this thread earlier, there is a DIY ps for the Squeezebox at www.teddypardo.com. I have not built or used it but I do know a few people that like it on their system.
Cheers,
Shawn
Noskipallwd
New member
Great job Lar! I bought my SBT with a CIaudio ps as a package deal. I just picked up a nice 128GB ssd that I converted to USB, I plan on using either a Sheevaplug or a Goflex net to make the SBT a stand alone server with no computer required.
Cheers,
Shawn
Cheers,
Shawn
Noskipallwd
New member
Yeah, unfortunately it's all I can afford at this time, I went with the Goflex so I can dock a 1TB esata drive and store files on it as well. Squeezeplug will work with esata but I will most likely rotate files on and off the ssd for playback.Lar said:
Cheers,
Shawn
Noskipallwd
New member
Lar, how does it sound installed, any improvement?
Cheers,
Shawn
Cheers,
Shawn
InfernoSTi
New member
Lar, that looks very clean...nice work! Everything else is stock, right? I, too, am interested if you are hearing any sound quality changes. John
Noskipallwd
New member
That is great Lar, you get alot of satisfaction out of building your own gear! Where did you get the plans for Johns design? I changed my set up for the SBT, I bought a vortexbox appliance, which I converted to fanless, added 3 more gb of ram, replaced thie internal hd with a 60gb ssd, and set up an external 2 drive raid for the file storage ( 2 480 gb solid state hds), when I build a mac mini based server I'll use the raid because it can also connect to esata. Again, great job on the ps.
Cheers,
Shawn
Cheers,
Shawn
Noskipallwd
New member
So far I am liking the vortexbox, if you have alot of cds or dvds that need to be ripped it is perfect. I was originally going to build my own mini pc and install vortexbox but after buying memory the HDs and performing an ISO install of the vortexbox os (fedora linux based), I decided to buy the appliance and modify it for my own uses. The first night I had it I ripped 65 CDs to flac without any issue. Most took 3-5 minutes, but there were a couple that were damaged enough that the cd paranoia error correction took about 20 min. to complete. I don't like it's tagging structure for classical so I am ripping all of those using Max, XLD under OSX and dbpoweramp under windows. The appliance uses very little power, so leaving it on 24/7 is not a problem and it came with LMS already installed.
Cheers,
Shawn
Cheers,
Shawn
