12 VDC Linear Power Supply

machone
machone Posts: 1,471
in Electronics
I am building a 12 VDC linear power supply to replace the wall wart that came with my fanless Windows 10 computer (Quantum Byte).
I bought a open frame power supply and a case to house it.
I had planned to use an IEC inlet with a 3 prong cord and ground the power supply frame.
Is this correct or should I just use a polarized 2 prong cord with no ground?

kklgqkcjm1x9.jpg
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Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
1KVA Dreadnought

Marantz SA 8005
Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
Yamaha TX-540 Tuner...Sony BDP-S570
Sony PS4

Separate subpanel with four dedicated 20 amp circuits.
1. Amplification 2. Analog 3. Digital 4. Video

"All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
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Comments

  • machone
    machone Posts: 1,471
    Somebody throw me a bone!
    To ground or not to ground? :)
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
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  • lightman1
    lightman1 Posts: 10,776
    Trial and error method. If you get noise or feedback, just remove the chassis ground.
    Looks like it's designed for a non ground two wire input from the looks of the line voltage block taps.
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  • machone
    machone Posts: 1,471
    Thanks lightman1.

    I got the case in today.
    I am going to paint it if I can find some black paint. B)

    7clfqsi7fae7.jpg

    irt5fj91xb2s.jpg
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • FTGV
    FTGV Posts: 3,649
    edited July 2016
    Definately,for your own protection I would use the IEC and connect the safety ground to the chassis.
    Also I would be sure the ac input is fuse protected in case of a failure in the supply.
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  • lightman1
    lightman1 Posts: 10,776
    Good point. Check if the power input is fuse protected. I didn't see any in the pics. But it might be in the supply input block.
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  • lightman1
    lightman1 Posts: 10,776
    Nope. No fuses for the input side of the TX. Safety first.
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  • machone
    machone Posts: 1,471
    Their website has a chart with fuse values. I will definitely add a fuse block.
    Thanks

    IEC inlet, 12 volt jack and plugs

    lyacoffpxbhv.jpg

    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • msg
    msg Posts: 9,424
    I vote no ground, no cover, and wet hands.
    Anything else is for wussies.
    I disabled signatures.
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  • machone
    machone Posts: 1,471
    I could let the grandkids test it.
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • machone
    machone Posts: 1,471
    I have completed the case. Going to finish the 12v cable tomorrow.
    After testing I think I will paint the outside black and line the inside with Dynamat.

    psvb7eptb2sh.jpg

    yc3liv19er5i.jpg

    hgahycr34p0p.jpg


    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • agfrost
    agfrost Posts: 2,421
    machone wrote: »
    After testing I think I will paint the outside black.

    Good luck with that. ;)

    Cool project.
    Jay
    SDA 2BTL * Musical Fidelity A5cr amp * Oppo BDP-93 * Modded Adcom GDA-600 DAC * Rythmik F8 (x2)
    Micro Seiki DQ-50 * Hagerman Cornet 2 Phono * A hodgepodge of cabling * Belkin PF60
    Preamp rotation: Krell KSL (SCompRacer recapped) * Manley Shrimp * PS Audio 5.0
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  • SCompRacer
    SCompRacer Posts: 8,352
    edited July 2016
    machone wrote: »
    I have completed the case. Going to finish the 12v cable tomorrow.
    After testing I think I will paint the outside black and line the inside with Dynamat.


    Nice work! I like Rust-Oleum Black purchased from a hardware store. Once it dries thoroughly you can sand and buff it out and wax it if you want.

    I always thought linear needed more letters to sound more linear....

    Oh, I am serious about the paint and you can buy it wherever you want. ;)

    bh_eros_13a.jpg
    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ * Signature Series Sonore Music Server w/Deux PS * Roon * Gustard R26 DAC / Singxer SU-6 DDC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *
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  • machone
    machone Posts: 1,471
    Yeah,
    I am relatively new to this forum and have never understood the history behind the "Black Paint" discussion. B)
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • machone
    machone Posts: 1,471
    I finished my power supply. Painted black with Dynamat.

    2mmh324qnl6c.jpg

    fwbum3e2hkgm.jpg

    Mounted it on the side of my rack.

    772dil1l3hjt.jpg


    9wgxa7ktzop3.jpg

    The output voltage at the end of the cable is 12.04 vdc. I turned the volume up and there is zero hum. After running at load for a couple of hours the case is cool as a cucumber. I got rid of the wall wart that came with the Quantum Byte computer.

    The sound is improved with the linear.
    Bass is very solid with more impact, more layered with some mid bass growl that I have never noticed before.
    The highs are smoother. I have one recording that is shrill and always runs me out of the room and last night I was able to enjoy it.
    Imaging is great as usual and seems more layered in depth.

    Compared to the Marantz optical disc drive it is very close and with some recordings I may prefer the computer.

    There is no doubt in my mind that going fanless, cleaning up input power, usb power and using ss drives all have a cumulative and positive impact on computer generated music.
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • Mikey081057
    Mikey081057 Posts: 7,127
    Nice.... you should build another 1 for sale....
    My New Year's resolution is 3840 × 2160

    Family Room| Marantz AV7704| Usher Dancer Mini - 2 DMD Mains |Usher Dancer Mini-x DMD's Surrounds | Usher BE-616 DMD Center | SVS Ultra Rear Surrounds | Parasound Halo A21 | Parsound Halo A52+ | MIT Shotgun S3's | Dual SVS SB 4000 Ultras | Oppo UDP 203 | Directv Genie HD DVR | Samsung 75" Q8 QLED | PSAudio Stellar GCD | Mytek Brooklyn DAC+ | Lumin U1 Mini | HP Elite Slice PC | ROON'd for life |

    ManCave: HT:Polk LSiM 706VR3 LSiM 703's LSiM 702's|| Marantz AV7002 AV PrePro Sunfire TGA-7401| Sony PS4 Pro| Sony PS4 Pro|SVS PB13 Ultra| Oppo UDP 203 | Music Hall MMF 5.3se TT w/ Soundsmith Carmen | Samsung 55" SUHD TV | Sony PS4

    Patio | Polk Atrium 8's | Yamaha R-N303BL |

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  • machone
    machone Posts: 1,471
    I upgraded my DIY linear power supply to a Mojo Audio Joule v5.0.
    Feeding my Quantum Byte it's outstanding.

    x7n9ck5m33g8.jpg


    Along with my recent power circuitry upgrades this pushes my system to another level. Quieter, better dynamics, smooth, fast, wide, deep with great imaging. If I did not know where the speakers are located I could not point to them.

    I am grinning from ear to ear B)
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
    · Share on FacebookShare on Twitter
  • VSAT88
    VSAT88 Posts: 1,227
    machone wrote: »
    Thanks lightman1.

    I got the case in today.
    I am going to paint it if I can find some black paint. B)

    7clfqsi7fae7.jpg

    irt5fj91xb2s.jpg

    Where do you find Black Paint ??
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  • VSAT88
    VSAT88 Posts: 1,227
    edited March 2017
    machone wrote: »
    Yeah,
    I am relatively new to this forum and have never understood the history behind the "Black Paint" discussion. B)

    Funny:

    http://forum.polkaudio.com/discussion/29186/where-to-buy-black-paint/p1
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