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Thread: Help with power supply for Mitsubishi Model M2896 8" Drive

  1. #1
    Join Date
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    Default Help with power supply for Mitsubishi Model M2896 8" Drive

    I have a model M2896 Mitsubishi 8" diskette drive, I have the following setup below.

    I have a DBIT power adapter and a DBIT 50 to 34 pin cable adapter. On Chuck G's advice I have tried to operate the Drive with an Adaptec Drive with a floppy controller, Sergey's FDC controller board as well as an XT-FDC board from the forum. All of them work.

    I am trying to assist a friend who is trying to setup the same basic configuration with a Shugart 851. He is hoping to find a less inexpensive option that the DBIT adapters. I found a 50to34 PCB that think will work.

    Can I use a MEAN WELL AC-DC Power Supply Dual Output 5V 24V, that you find on Amazon, with the correct connector for the Shugart Drive.


    Thanks,


    Jimmy



    8InchDrive.jpg
    Last edited by Jimmy; February 21st, 2019 at 12:30 PM.

  2. #2

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    Looking up the power requirements for the SA851, I see 1 amp for the 24V and 1.1 amp for the 5V. If the supply you are looking at is rated for that or more you should be OK.
    Dwight

  3. #3
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    Don't overlook DC-DC boost converters; this is what I use for my Tandon TM-848s, but there are lots out there.

    https://www.ebay.com/itm/1x-150W-Boo....c100005.m1851

  4. #4

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    Quote Originally Posted by MikeS View Post
    Don't overlook DC-DC boost converters; this is what I use for my Tandon TM-848s, but there are lots out there.

    https://www.ebay.com/itm/1x-150W-Boo....c100005.m1851
    If boosted from 12V it is about 2.5 to 2.75 amps extra.
    Dwight

  5. #5
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    I've also used a standard 5+12 VDC supply with a separate 24V supply. In any case, it shouldn't be too hard--there were lots of open-frame 5+24V supplies in the day.

  6. #6

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    I've got a couple of 230v... +5V 50A, +18V 3.8A, -18V 3.8A supplies. Gonna make an electric chair with one.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  7. #7
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    Quote Originally Posted by Chuck(G) View Post
    I've also used a standard 5+12 VDC supply with a separate 24V supply. In any case, it shouldn't be too hard--there were lots of open-frame 5+24V supplies in the day.
    Yeah, I've also got a few of those but when the system is a PC or otherwise with an AT/ATX supply with lots of amps then the $4.00 converters are very convenient.

    I've got a 400W ATX supply in an S100 box to power two ST-4096s and the floppies, including the TM848 using one of those.

  8. #8

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    You can also float a 12V on a 12V grounded supply..
    Dwight

  9. #9

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    http://minuszerodegrees.net/temp/3/temp_65_85892.jpg


    I kept that link for reference for the connector.

  10. #10
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    Be aware that a few very old 8" drives also specify a -5V supply (but not the one the OP specified).

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