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About lkong

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  1. lkong

    The Multi Amp aka Dynalo Mk2

    If I were to replace input BJTs with JFETs(toshiba or linear), what IDSS range should I aim for?
  2. lkong

    The ultimate DIY? A Stax SRM-T2!

    Are those holes drilled by a shotgun?
  3. lkong

    Part Sourcing Assistance/Advice Thread

    I need to make/buy some very short and soft (5-10cm) USB cables. Any suggestions?
  4. lkong

    and now for something completely different part 3

    All in those two google drives: https://drive.google.com/drive/folders/0B7egryukiT7_TFlEQlBRejdVdDQ https://drive.google.com/drive/folders/0B_iJFfZStuVhSE5nOHBVdTByR1k
  5. lkong

    Speaker Porn

    Are you a cop?
  6. lkong

    Speaker Porn

    Were you on Reddit too? Saw this earlier from Reddit.
  7. lkong

    and now for something completely different part 3

    Planning to use the amp to drive my Quad ESL 63. Somewhere there might be a pair of Magnepan 3.7 with my name on it, but that's down the road.
  8. lkong

    and now for something completely different part 3

    25amp draw that's for 4 boards or 2 boards? If it's 25amp for 2 boards, the 800W PS should do 2 boards nicely. If not there's always 2kW ones.
  9. lkong

    Happy Birthday Kerry!

    Happy Birthday Kerry!
  10. lkong

    and now for something completely different part 3

    I think congo5 used xicon, which you will have to bend the legs. That's fine for me. I believe the Uberamp drive board runs on +/- 40Vdc. It can certainly run on lower rails. It will be a two chassis solution in my case. I was inspired by Benchmark AHB2. Is it a good idea to use SMPS for the unreg power supply? Like this one: http://connexelectronic.com/product/smps800re/ +/- 50 for unreg, and GRLV drops it to +/- 40 for reg.
  11. lkong

    and now for something completely different part 3

    Got my Uberamp boards. Here's my version of BOM if it helps anybody: https://docs.google.com/spreadsheets/d/1EIAvFJHqTJL5zzM43FIhz-wJhd_scJiClbLd24QNv9s/edit?usp=sharing Here are a few questions: 1 Power rating of the big .47 resistors. The best option for 10W seems to be this: https://www.mouser.com/ProductDetail/Xicon/280-CR10-047-RC?qs=sGAEpiMZZMtbXrIkmrvidMioh4DscLtBmqbN3KPTLlY%3d Although the lead space is shorter than the length of the resistor. There are a lot more options at 5W. 2 What's the 5k trim pot for? 3 How to wire it for balanced setup (2 boards per channel)? Also what are +/- reg drvier for?
  12. lkong

    Constant pressure tube substitution

  13. lkong

    Constant pressure tube substitution

    My guess is pressure = 压力 = 电压 = voltage? stable pressure = 稳压 = voltage regulation? So the whole thing translate to: I'm gonna be rude here, but you will have to give me the answer.
  14. lkong

    Massdrop copycat R2R DAC

    I happened to know sosolar personally. Maybe a collaboration after this wave of MD shit show?
  15. https://www.massdrop.com/buy/massdrop-x-airist-audio-r-2r-dac/talk/2101227?utm_source=linkshare&referer=TYMJB2 On the left, sosolar's design since 2015, on the right "Massdrop Made" by Airist audio. That's a new low for Massdrop.