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lkong

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Everything posted by lkong

  1. lkong

    Speaker Porn

    I wonder if the bass will make the stands do tippy dance.
  2. Is it too late? Please sign me up for: 2x GRHVxxx1x GRLV79xx1x GRLV78xx1x Main Board 1x miniT2
  3. Unfortunately for me, I have to supply [email protected] L-Adapter looked promising but only go up to 20V. I've ordered Smooth Like Butter Single Rail. PCB+parts+shipping will cost around $100. Hope this solves my problem.
  4. Got my 24V assembled and running. I dont think it handles high current nicely. with 2A load @ 24v, I have about 1V drop at the output.
  5. lkong

    Sparkos?

    https://www.audiosciencereview.com/forum/index.php?threads/rolling-op-amps-in-gustard-h20-headphone-amplifier.7407/ Not sure if this test is comprehensive, it doesnt look too good for Sparko.
  6. Looking close to this: https://www.diyaudio.com/forums/group-buys/333844-ideal-bridge-rectifier-gb.html
  7. Got my Voron 2.1 printer somewhat put together. Voron2.1 - Imgur.mp4
  8. What worries me is what caused it, I simply tested the amp with 1k sine wave. I hope it's just the input jfet.
  9. I think I let the magic smoke out by swapping into JFET input. Now the amp functions normally with input on + and G input, but not - and G. Should I worry about anything else than the J109? (another pair of J109 and K389 worked perfectly)
  10. Is there a high pass/low pass between electrostatic and dynamic? Or they are wired in parallel.
  11. I'm intrigued, I wonder if it would be a good entry level turntable?
  12. I think somewhere in this thread said 100k
  13. Had common.net installed one of these on my roof. Now I'm part of wireless mesh.
  14. If I were to replace input BJTs with JFETs(toshiba or linear), what IDSS range should I aim for?
  15. Are those holes drilled by a shotgun?
  16. I need to make/buy some very short and soft (5-10cm) USB cables. Any suggestions?
  17. All in those two google drives: https://drive.google.com/drive/folders/0B7egryukiT7_TFlEQlBRejdVdDQ https://drive.google.com/drive/folders/0B_iJFfZStuVhSE5nOHBVdTByR1k
  18. lkong

    Speaker Porn

    Were you on Reddit too? Saw this earlier from Reddit.
  19. 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.
  20. 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.
  21. Happy Birthday Kerry!
  22. 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.
  23. 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?
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