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  2. Laowei

    current feedback electrostatic amp

    That answers a lot for me. I have a breadboarded CFEA up and running and was not warming up to the sound of it. I set it aside and went back to my GG, much prefering it as my daily amp. Maybe I need to play the CFEA for hours as you suggest to really retrain my ears.
  3. Knuckledragger

    The Knuckledragger 3rd Memorial Slow Forum Post

    "System that prevents problems with little nephews."
  4. Today
  5. Pars

    The Multi Amp aka Dynalo Mk2

    Re: Mini Dynalo I thought I had posted this here, but apparently I didn't (had some PMs going at the time). When I was getting ready to ship the last mini out that I built, I noticed an odd problem in that occasionally DC offset on the SE would jump to ~500mV at startup. To make a long story short, I determined via scope that the Meanwell bricks don't always start up at the same time. When the + comes up first, the servo opamps freak out briefly, causing the offset. Without the 0R jumpers in you'll never see this. And it only affects SE output; the balanced output offset is always fine. A month or so ago, while perusing diyaudio, I ran across a comparator circuit used for power management in, of all things, the O2 amp. This circuit, placed before or after the regs, with proper parts selection for voltages, would cure this "problem". I realize virtually no one would build one of these for SE output use, but one thing to be aware of. If you are using SE phones with these, wait about 30 secs. before plugging them in. I did PM this info, and this circuit to Kerry, but he has a lot of fires burning and redoing the mini probably isn't even on his radar
  6. Kerry

    Happy Birthday raffy!

    Happy Birthday!
  7. Kerry

    Happy birthday robm321

    Happy Birthday!
  8. Yesterday
  9. blessingx

    The Official Head-Case Photography Thread.

    We need more of these.
  10. Knuckledragger

    The Official Head-Case Photography Thread.

    I have no idea how to embed photos with links on the current version of HC. This is a warm up to a future, much larger post: Photo desc from Flickr:
  11. grawk

    HC Motorcycle Gang

    I'm gonna officially start my midlife crisis this weekend if it doesn't sell before then. I'm gonna go look at a '91 harley FXR saturday.
  12. Knuckledragger

    A Game of Thrones Pilot Greenlit

  13. Looser101

    Happy birthday robm321

    Happy Birthday!
  14. Voltron

    Happy birthday robm321

    Happy birthday Rob! Cheers!
  15. jose

    What are you listening to Part the Third

    I prefer "Revolver" ( IMO the best album of the boys of Liverpool) but "Abbey Road" is no bad.
  16. jose

    current feedback electrostatic amp

    We haven´t talked much about this amplifier. 🙄 I usually need some time to adjust to the sound of a push-pull amplifier. Once time passes (hours) I feel very comfortable with him. Honestly, I don´t see any flaw: it has a fairly defined and balanced sound, enough power... to put something negative, the only problem I see is that not all adapt to the sound of a push-pull amplifier (paradoxical) ... But that's what Carbon is for.
  17. mwl168

    current feedback electrostatic amp

    22.5mA current is a lot for a push-pull amp so you can reduce it quite a bit to manage the heat. Changing either the 2K or 500K accomplish the same thing - IIRC, they form a voltage divider. Curious to hear what you think of its sound compared to your other amps.
  18. Knuckledragger

    Speaker Porn

    Really just as much room porn, innit?
  19. robm321

    Happy Birthday raffy!

    Happy Birthday!
  20. Augsburger

    Happy Birthday raffy!

    Happy Birthday!
  21. Augsburger

    Happy birthday robm321

    Happy Birthday!
  22. Grahame

    Happy birthday robm321

    Happy Birthday, Rob!
  23. skullguise

    Happy Birthday raffy!

    Happy Birthday!
  24. ironbut

    Happy birthday robm321

    Happy Birthday!
  25. ironbut

    Happy Birthday raffy!

    Happy Birthday Raffy!
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