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Thread: Phase Linear 400 Fan Assembly Project

  1. #1
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    Phase Linear 400 Fan Assembly Project

    Recently i went and did full pl400 rebuild and i must say i'm am very happy with the results.
    I have 4 ohm AR98LSi speakers which make my pl400 very hot, It does not help that i have it seating in the wood case inside a stereo cabinet. there is no air movement and it gets hooot!!. i was looking for a fan to install and i realize that there is nothing there to get. I see many homemade solutions and i thought that i have to come up with my own solution.

    Well im not a expert when it comes to designing but i have ideas, and i would like to share one of them with you. Please be easy on me, lol.
    I decided to make a design that would meet the following requirements.

    - easy install simple design
    - two fans - one for each channel
    - fan control board to control fan speed based on the temperature
    - something that i can afford and make myself. (i spend all my $$ on the upgrade lol)

    I order all the necessary parts , some of them already came, and some are still being build by small children in china / not funny but true.

    I decided to build a fan housing using a 3d printer.
    My printer can not print one big piece so i made three pieces design, which once assembled will make one piece.

    Piece I: Right channel housing
    Piece II: Control board bridge
    Piece III: Left Channel housing

    I made the design for right channel and the bridge pieces and i get rest of my parts i will measure them again and if everything checks OK, the printing begins


    here is the Right Channel housing design
    Click image for larger version. 

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    the design is for a 4 fin sink, where the housing is force-fit onto two outside fins for each channel.
    it holds one 80mm fan which will blow air in and then hot air will exit out around the fan(remember i have a wood case). or the fan can be install to pull air out. i don't know which will work better.

    Right and left Channel housing will be connected together via the control bridge piece which will be seated in the space between right and left heat sinks

    here is the bridge piece ,
    Note: i will include into the design power switch, 12v female input connector for a power supply, control board, thermal probe, and fan failure buzzer once i get all the parts in.

    Click image for larger version. 

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    Please let me know what you think and if you have any suggestions i take them now before the printing.
    Thank you.
    Pioneer SX-1250 | Accuphase P-300 | Accuphase C-200 | PL-400

    Cerwin Vegas VS-120 | AR 98LSI

    Marantz 6300 | Pioneer PL-530

    Sony TC-755 | Sony TC-756 | Sony TC-758 | Sony TC-788-4 | Revox B77 | Revox PR99 MKII

    Pioneer CT-F1000

  2. #2
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    laatsch55's Avatar
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    Halfbiass...Electron Herder and Backass Woof
    i LIKE IT BUD, VERY ELEGANT solution...
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  3. #3
    Forum Veteran bill7621's Avatar
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    I like it too. What are you going to use for the fan controller or are you designing your own?
    Some people are like slinkies; Not really good for anything, but sure bring a smile to your face when you push them down a flight of steps

  4. #4
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    There are few available PC fan control boards which should work just fine. i have two coming to see which will work best. For the price it is not feasible to design and make one.
    Pioneer SX-1250 | Accuphase P-300 | Accuphase C-200 | PL-400

    Cerwin Vegas VS-120 | AR 98LSI

    Marantz 6300 | Pioneer PL-530

    Sony TC-755 | Sony TC-756 | Sony TC-758 | Sony TC-788-4 | Revox B77 | Revox PR99 MKII

    Pioneer CT-F1000

  5. #5
    Journeyman Member kingman's Avatar
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    BRAVO!!!

  6. #6
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    ---I run with Scissors
    There will be bonus points if you incorporate this very 'COOL' item, instead of just a boring fan:

    http://www.ebay.com/itm/12V-6A-DIY-E...3D122245768468


    There is quite a variety of ideas when I searched 'Semiconductor Refrigeration'. In the past , I've alway's just searched for 'cooling fans'.
    How about the electric refridgeration pads for laptops?
    If gaming desktops can have refridgeration, then why not hi fi equiptment?
    https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313.TR1.TRC0.A0.H0.TRS0&_nkw=Semiconductor+Refrigerator&_sacat=0
    Last edited by Bradrock; 07-29-2017 at 01:40 AM.

  7. #7
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    Lol. This is nice but overkill. 5A to run it lol. And 3 fans. I wonder how loud it gets. I might just get one to play with it.
    It is design for cpu. It won't work well with pl400 cooling heatsinks, i don't think.
    Condensation is always an issue with this kind of cooling. I used water cooling for my PC rather than refrigerator coolers due to the frost/condensation build up in high humidity environment.
    Fans are boring.... But they get the job done hehe.. the ones I intend to used run off 0.16A each. Variable speed. Very quiet, I hope.

    I will attempt to print first piece on Monday. One part will take 11h to print, if everything goes as planned.
    Pioneer SX-1250 | Accuphase P-300 | Accuphase C-200 | PL-400

    Cerwin Vegas VS-120 | AR 98LSI

    Marantz 6300 | Pioneer PL-530

    Sony TC-755 | Sony TC-756 | Sony TC-758 | Sony TC-788-4 | Revox B77 | Revox PR99 MKII

    Pioneer CT-F1000

  8. #8
    Administrator
    laatsch55's Avatar
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    Halfbiass...Electron Herder and Backass Woof
    3D printing ain't fast, that's for damn sure....
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  9. #9
    Forum Veteran Billboard's Avatar
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    I need to add some fans to me PL 700B, they drive a pair of 4 ohm speakers (Ohm Is), and the amp does get hot, and will shutdown if I run it too long at a high volumes. The pros had trouble cooling these amps when they were used for sound reinforcement, I doubt a couple of muffin fans will be enough.

    But couldn't hurt I guess.

  10. #10
    Forum Veteran orange's Avatar
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    If you're needing fans to prevent thermal shutdown, forget switching, they come on the moment the amp powers up. Later is too late.
    Nothing is misguided to it's creators, only the recipients who didn't want the expectation ruined for them.

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