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About sorenb

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  • Birthday August 19

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  • Interests
    patchwork, pilates and cupcake baking


  • Headphones
    some I got from an American Airline flight

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  1. stax mafia circuit boards

    I might have two sets I want to depart with 2mm/4oz
  2. i'm on a roll... the kgsshv

    <10V offset isn't a problem. Engaging the servo should quickly get you <1V
  3. grounded grid

    lower the tail resistor by some ~50ohms and re-adjust
  4. grounded grid

  5. Do you still have extra Carbon boards? I'm interested in one (one pair?) to build amp.


  6. 2018 PCB Group Buy with TKD pots

    seeing only a few people have signed up for Carbon boards. I have some version 6g from PCBNet 2mm/3oz, that I don't mind departing from (16.75USD/ea). If interested shoot me a PM.
  7. KGSSHV Carbon Build Thread

    ....same source as for the other 10m90's in your build?
  8. KGSSHV Carbon Build Thread

    where did you get those 10m90's from?
  9. KGSSHV Carbon Build Thread

    unless you've got bad 10m90's (I've never come across any) I find it peculiar that both seems to be acting up pull out one 10m90 and test it with a DMM at ohms, test drain-source: short all legs, before measure drain-source => very low ohms if you don't get that the 10m90's are probably bad if you have a breadboard you might find it useful to build a cascoded css including the trimmer, and test as previously described. If you can't adjust the current using the trimmer, the DN2540 is probably bad (I've seen that a few times) Or you can use an 8pin IC-socket with resistors+trimmer soldered to build a bug-style test CCS-fixture. .
  10. and now for something completely different part 3

    Very nice build Jose con grat!
  11. goldenreference low voltage power supply

    Yes, check your rectified input voltage ...probably too low ...or you might be pulling too much current >3A or so
  12. KGSSHV Carbon Build Thread

    not sure how you can measure currents like that using 18V ....sounds like something else is wrong ...
  13. KGSSHV Carbon Build Thread

    detach the HV rails and use the +LV or two 9V batteries
  14. KGSSHV Carbon Build Thread

    Have you checked the rail as described in the link I pointed to above?
  15. KGSSHV Carbon Build Thread

    you might find this useful, and be aware that the negative rail is identical to the positive, so the voltage ref 'ground' ref is the negative rail rahter than ground.