au-505 rectifier substitute

Discussion in 'Exclusively Sansui' started by petehall347, Jun 12, 2012.

  1. petehall347

    petehall347 the brandy coffee man Subscriber

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    rectifier fitted is IR 10dc1 .its dead short so i was thinking 2x 1n4007 to replace it.
    any reason why not ?
     

     

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  2. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    I can only find an NTE equivalent data not the original.... 600v, 1A rectifier? :idea:

    One 1N4007 should be enough....? (1N4007 = 1000v, 1A)

    (I would have thought 10DC1 would be a 100v, 1A rectifier - but I can't find a data sheet)
     
    Last edited: Dec 3, 2018
  3. petehall347

    petehall347 the brandy coffee man Subscriber

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    the 10dc1 that came out has 3 legs . 2 for ac one for dc .so its sorta half wave rectified using a double diode . the 10dc1 is rated at 1amp .i fired it up with 2 1n4001.s and it seems to work ok . i just thought for good measure use the 1n4007,s
     
  4. Stene

    Stene The Introducer

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    According to a Technical Manual from Sansui
    10DC-1 (black)
    VRM 100
    Io 1.8
    Center tap +

    10DC-1R (red)
    Center tap -
     
  5. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Aha, in that case you will need at least a pair of 1N4002's (=100v VRRM) as 1N4001 is only 50v VRRM - as I you know a pair of 1N4007 will do just as well. (got there in the end - :))
     
    Last edited: Dec 3, 2018
  6. petehall347

    petehall347 the brandy coffee man Subscriber

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    cheers
    1n4007 are now ordered
     

     

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  7. petehall347

    petehall347 the brandy coffee man Subscriber

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    righto if anyone else reads this in the future the 2 1n4007 diodes work well instead of the original dual diode .
    i could of course installed a modern dual diode rectifier but this way is much cheaper .
    plus there are holes already in the board for the 2 positive ends of the diodes .
     
  8. toscanob

    toscanob New Member

    Thanks, guys from the past. LOL
     
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  9. AcerPalmatum

    AcerPalmatum New Member

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    The thread that keeps on giving. I just replaced a 10dc1 with 2x 1n4007. It seems to be holding up well
     
  10. dapbmw

    dapbmw New Member

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    Hello so where do you put the the 2 wire newer style diodes as the old ones have 3 legs, sorry not technically inclined, if you can post photos, I would appreciate it. :)
     
  11. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    The original seems to be an encapsulated pair of rectifier diodes, the device has 3 legs, and often the internal arrangement is printed or moulded into the case.

    It should look like this AC ~ ----I>I----I----I<I---- ~ AC - a connection at each end for AC from the transformer, and the centre connection is the 'DC out' connection, 3 connections in all.

    Your replacement rectifier diodes look like this ----I>I---- ----I<I---- there should be a band or mark on them to indicate polarity - I have marked where the bands should be with a bold line, like this ' I ' - join the 2 banded ends together - this is the DC out connection, the other ends of the rectifier diodes are the AC inputs, 3 connections in all.

    Get yourself a copy of the Service Manual and take a look at the schematic diagram - all of this should then be a lot clearer to you. ;)

    Post #5 in this thread shows the 3 connections to the dual rectifier diode, Mauve = AC, Orange = DC (which has been replaced here with a new dual rectifier).
    http://audiokarma.org/forums/index....ng-distance-of-the-best.826006/#post-11686575

    I hope this helps.
     
    Last edited: Feb 11, 2019

     

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  12. petehall347

    petehall347 the brandy coffee man Subscriber

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    the holes are already there if it is the
    au-505
     
  13. eizner23

    eizner23 Well-Known Member

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    This thread could use an image of 2x4007 for 10DC. Here is mine.

    20190210_145056.jpg
     
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  14. smurfer77

    smurfer77 AK Subscriber Subscriber

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    Nice work. I would be tempted to shield the top of that beautiful work, for safety.
     

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