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About hyperma

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  1. hyperma

    KGSSHV Carbon Build Thread

    It's true, for diyer, Mouser, RS , Element14 or TME etc are best choice. Few month ago,I have bought some FAKE PCM1704s, of course they didn't work. The best way to find out who they are , is disassembling.....by fire, on microscope , I saw HC574 and TI mark on the die.......What a joke. Another example was my personal favorite op LM4562, I got some on same way, and matched their dies with AD744, remarked for sure. Also funny is in China AD744 is more expensive than LM4562 now. Hell......but seems Kevin already known everything about fake parts.😎
  2. hyperma

    KGSSHV Carbon Build Thread

    The price ..... worth that risk, AK4497 $35per/100pcs and $5 a package of TIP122(500 pcs).
  3. hyperma

    KGSSHV Carbon Build Thread

    To be honest, I don't have much EXP on this, but 40 USD is enough to afford the alumium amplifier case with heatsink......few weeks ago I took a relay pcb from garbage bin,it's working on Carbon(or more carbon) now, don't you want to make your own one?
  4. hyperma

    KGSSHV Carbon Build Thread

    Finally, well, I have fixed the "KG Carbon - more carbon" ......,in beginning I wanna make a "more carbon and lots cheaper version",but see what I got: DN2540 and IXCP10m90s I have bought from taobao.com......are fake, now show you guys photo: Fake DN2540(yes, I have bought all of them for testing): simply them didn't work ,that's all , I can read 455V from multimeter though probe touch the headsink,but....nothing happened, until I replaced the replica silicon: Mouser version: Taobao - Save your broken heart also bit expensive version: Now the IXCP10M90S time: Left: mouser Right:You don't know who I am version
  5. hyperma

    KGSSHV Carbon Build Thread

    Really hate lead-free......unfortunately that's all I got, can't wait to show another PCB I have done with 63/37.
  6. hyperma

    KGSSHV Carbon Build Thread

    162v and on heatsink I remember.
  7. hyperma

    KGSSHV Carbon Build Thread

    the rms volt of transformer is 348v , I cant reach the cap due to parallel installed pcb ,measured 450v from 10m90s and c2ms drain by multimeter. On monday I will bring oscilloscope to studio.
  8. hyperma

    KGSSHV Carbon Build Thread

    I will replace all bridge diodes by stth512s on Monday, just noticed something. I bought smt k389 from taobao , they are made by linear.sys , cost 45rmb or 5 pounds , mint choice.
  9. hyperma

    KGSSHV Carbon Build Thread

    Replaced STTH512 by infineon IDH10S120 on PSU ..... Hmmmm.....no output voltage. I'v chosen this diode for making a "more carbon version KG Carbon", and the performance of IDH10s120 way better than STTH512 on paper but donno what happened. I bought some SMT version of 2SK389 for better thermal coupling and way cheaper......hope it works.