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Marantz 1030/1060 P700 Board Replica

Discussion in 'Marantz Audio' started by ton4eff, Nov 21, 2015.

  1. rBuckner

    rBuckner Luv 2 Restore Subscriber

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    9,636
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    Prescott, Arizona
    Lookin' good. Are the wire connection post/pins new or recycled?
     

     

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  2. ton4eff

    ton4eff Active Member

    Messages:
    173
    Location:
    Тополовград
    Yes, I recycled the pins, I don't know if it is possible at all to find new ones. And today I ordered the transistors, I hope they are genuine this time (from Farnel), and these caps for C725 and C726: click. I hope they will be a good replacement for the missing originals...
     
  3. cortico

    cortico Active Member

    Messages:
    286
    Location:
    New York
    very well done, beautiful soldering job! :bowdown:
     
  4. ton4eff

    ton4eff Active Member

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    173
    Location:
    Тополовград
    Making replacements for the missing riser/mount stands for the TO-39 transistors, while waiting for the 1N60's and wondering where to find the source for the original TO-39 heatsinks :confused:

    2016-01-23 13.51.58.jpg
    2016-01-23 15.57.27.jpg
     
  5. paul_ral

    paul_ral Active Member

    Messages:
    259
    You can find OEM 1N60 in old car radio
     
  6. ton4eff

    ton4eff Active Member

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    173
    Location:
    Тополовград
    The diodes from the above link arrived today and they are bad. :mad: This was the last semiconductor I bought from ebay! Everything is fake. :(
    @paul_ral, thanks for the suggestion, but I live in the area, where most of the old radios are from Russia, and they didn't use 1N60's...
     

     

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  7. KutzlerTrans

    KutzlerTrans Jennie & I with Buddy and Barney. Subscriber

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    Last edited: Jan 25, 2016
  8. ton4eff

    ton4eff Active Member

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    173
    Location:
    Тополовград
    The shipping cost from US to EU is little bit too much for a few diodes. Which is very strange, because I've sent to US many letters for just a couple of $. But thanks for the link anyway... :)
    I'll try to figure out something about these stupid germaniums... Maybe, at the end, BAT41 will be the final solution. But it will be like a splinter in my mind. :D
     
    Last edited: Jan 28, 2016
  9. Povertypanda

    Povertypanda New Member

    Messages:
    3
    This work is absolutely amazing. You really should recreate different boards for the popular models like 2270 / 2245 / 2275 etc. They would sell.
     
  10. Starquest

    Starquest Super Member

    Messages:
    1,210
    Location:
    Twin Cities, MN
    Gotta agree. Outstanding work, just awesome! I don't have any Marantz stuff, but now I wish I did!
     
  11. ton4eff

    ton4eff Active Member

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    173
    Location:
    Тополовград
    And it is almost finished, I hope tomorrow I will do the tests:
    This is the final revision of the schematic (the parts in red are soldered on the back of the board, as it is on the original), I'm attaching it in pdf format too:
    1060-P700.jpg
    20160204_144757.jpg
    20160204_175828.jpg
    20160204_175539.jpg
    20160204_175912.jpg
    After the tests, I'm starting to recreate the missing heat-sinks for the TO-39 transistors. I'm planning to make a vector image of the originals from my 2230. They look the same to me.
     

    Attached Files:

    • P700.pdf
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    Richs_Trains and quadtech like this.

     

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  12. ton4eff

    ton4eff Active Member

    Messages:
    173
    Location:
    Тополовград
    The P700 Board under test:
    2016-02-05 18.47.24.jpg

    Everything went smoothly, no surprises... The bias adjusted fine on both channels, after an hour plugged in. It will be adjusted along with the clipping more precise when the board is mounted properly on it's place. And I have to tell you - this thing already SINGS beautiful!:banana:
    So next to the final step - to39 heat-sinks... :idea:
     
    quadtech likes this.
  13. ton4eff

    ton4eff Active Member

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    173
    Location:
    Тополовград
    Today I did the vector drawing of the TO-39 Heatsink:
    [​IMG]
    The transistors diameter is 8.25mm and I made the central hole 8.2mm. It will require a little pressure to snap in to the place... Or so I hope... Now I'm starting to search for a local laser cut workshop. :rolleyes:
     
  14. rBuckner

    rBuckner Luv 2 Restore Subscriber

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    9,636
    Location:
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    Very cool, glad it came right up. :bigok:
     
  15. ton4eff

    ton4eff Active Member

    Messages:
    173
    Location:
    Тополовград
    Call me crazy, but I did a second revision of the heatsink. The reason - this way it's closer to the original, don't you think?
    [​IMG]
    [​IMG]
     
  16. rBuckner

    rBuckner Luv 2 Restore Subscriber

    Messages:
    9,636
    Location:
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    You're crazy! Just kidding ya friend. I'm glad I have an OCD brother in a far away place. Great job. The tiny ribs do increase the cooling surface area so were worth doing.
     

     

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  17. snorbans

    snorbans Member

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    65
    I agree, great wok. If you didn't have pins to recycle is there another solution you could recommend?
     
  18. ton4eff

    ton4eff Active Member

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    173
    Location:
    Тополовград
    These should do the job:
    1pin header.jpg
     
  19. Croaker

    Croaker New Member

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    21
    Location:
    Bowie, MD
    wow, this is art, amazing job at recreating that board.
     
  20. ton4eff

    ton4eff Active Member

    Messages:
    173
    Location:
    Тополовград
    The TO-39 heat sinks arrived. I had to expand the central hole to 8.2mm. I sent the drawing only with 3mm drill, because of the laser cut inaccuracy.
    [​IMG]


    And the two of the heat sinks are already mounted on the transistors. They look pretty much as the originals, don't you think?:banana:
    [​IMG]
     

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