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Discussion in 'Yamaha' started by amr2, Mar 20, 2018.

  1. bmanone

    bmanone Active Member

    Messages:
    144
    Location:
    Calico Rock, Arkansas
    Keep us posted on your progress, all four of the modules I installed are working great. If you have any installation questions let me know.
     
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  2. amr2

    amr2 Well-Known Member

    Messages:
    548
  3. bmanone

    bmanone Active Member

    Messages:
    144
    Location:
    Calico Rock, Arkansas
    Looks great. Man you do nice work! Let us know how you like it when you get the right channel done.
     
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  4. amr2

    amr2 Well-Known Member

    Messages:
    548
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  5. Bratwurst7s

    Bratwurst7s In The Frying Pan Subscriber

    Messages:
    4,231
    Location:
    Munich, Germany
    Beautiful work! :thumbsup:

    Cheers,
    James
     
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  6. rottalpha

    rottalpha Yamaholic Subscriber

    Messages:
    1,817
    Location:
    Middle of Crook County
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  7. bmanone

    bmanone Active Member

    Messages:
    144
    Location:
    Calico Rock, Arkansas
    Your work looks great, the amp looks brand new! Have you had a chance to do any listening?
    I wish i could find replacement black plastic bezel for mine where the meter and channel control are. Mine have cracks and plastic missing around the mounting screws.
     
  8. amr2

    amr2 Well-Known Member

    Messages:
    548
    Not yet, but I hope to do it soon. Today I’m going to adjust bias current. Mine plastic bezel is not perfect, it has some scratches. But after cleaning it looks pretty good :)
     
    Last edited: Oct 21, 2018
  9. amr2

    amr2 Well-Known Member

    Messages:
    548
  10. amr2

    amr2 Well-Known Member

    Messages:
    548
    The protection modules are working fine. The power on delay time is slightly different between channels, probably due to capacitors tolerances.
     
  11. bmanone

    bmanone Active Member

    Messages:
    144
    Location:
    Calico Rock, Arkansas
    The first amp looks really good. Both the relays on my P2200 click on about as fast as you can say "click click", with a bit of southern draw :).
    The back of yours looks different than mine where the mains come in vs. the fuses (probably due to 220v vs 110v model). I also replaced one of the quarter inch input receptacles with a nice RCA receptacle on both left and right channels.
     

     

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  12. amr2

    amr2 Well-Known Member

    Messages:
    548
    On mine there is about 1 second...It's not important but I don't like it very much. I will check it again :idea:

    mmm...It is not a bad idea :thumbsup:
     
  13. amr2

    amr2 Well-Known Member

    Messages:
    548
    Edited
     
    Last edited: Oct 23, 2018
  14. amr2

    amr2 Well-Known Member

    Messages:
    548
    Something important. BE is connected in series after beeing rectified with -B rail, to raise the voltage to -92V in the VAS. The speaker protection modules use optocouplers and thus the output of the bridge rectifier are not connected to speaker ground.
    But if another modules without optocouplers are used, a shortcircuit can be create.
     
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  15. SPL db

    SPL db It's all about the music! Subscriber

    Messages:
    17,745
    Location:
    Omaha, NE
    Very, very nice! :thumbsup:
     
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  16. amr2

    amr2 Well-Known Member

    Messages:
    548
    PS_1_small.png

    A simulation of what could happen if we attach a module with no floating groung to BE :yikes:

    PS_2_small.png

    and with floating ground

    PS_3_small.png
     
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  17. bmanone

    bmanone Active Member

    Messages:
    144
    Location:
    Calico Rock, Arkansas
    Good thing our modules have floating ground! Did the the other modules have a floating ground?
    Nice circuit simulation, what program did you use?
     
  18. amr2

    amr2 Well-Known Member

    Messages:
    548
    No...:yikes:
    Proteus
     
  19. bmanone

    bmanone Active Member

    Messages:
    144
    Location:
    Calico Rock, Arkansas
    Good thing we chose the other modules!

    Proteus looks good and easy to use, but I'll provably stick to a free solution that less convenient.
     

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