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About gepardcv

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  1. KG Balanced Dynahi build discussion thread

    Yeah, those are the numbers from the Gerbers I used for my boards. SMT and MJE output sand. No idea about sizes for any older revisions, but if you get me the Gerber for it, I could try to figure it out for you.
  2. KG Balanced Dynahi build discussion thread

    @Ariamella: I pulled the following numbers from the Gerbers, and I think they match the produced boards: - ssdynahibalsmtm.zip: 215.9×115.3mm - goldenreference6.zip: 93.3×109.9mm
  3. The Multi Amp aka Dynalo Mk2

    That looks pretty nice, @astro. I don't have an answer for your question, but I have another question for the wider audience: shouldn't the Mean Well PSUs use fuses on input for this circuit? I know these IRM units have some protection built in, but I don't understand how robust it might be.
  4. A Pipe Dream

    The advice I heard is a piano student should be able to easily play Bach’s Inventions and Sinfonias collection before studying the organ. Real pipe instruments are obviously huge, rare, expensive, and hard to get practice time on. Digital ones with nice consoles and pedal boards are accessible but still pretty large (not much worse than a grand piano, though less acceptable as living room decor). There is the small matter of adapting to the vastly different tactile feel of an organ keyboard, of course... As far as testing audio equipment goes, Marie-Claire Alain’s recordings are a standby for me (not least because few other instruments actually produce low frequency sounds). And if you like BWV 565, try 582 and 537.
  5. KGSSHV Carbon Build Thread

    Where are you sourcing the heatsinks?
  6. KGSSHV Carbon Build Thread

    Then you’ll suddenly decide it’s a good idea to build a T2...
  7. Chord Dave Any Good?

    A favorite misspelled catchphrase of astrostar, burned into my retinas from back when I paid attention to the Stax thread on HF. As I recall, he extolled the virtues of tube DACs, and sported an Audio Note build. This might be him, trolling here with a sock puppet account.
  8. The State of DACSES

    I heard good things about Auralic Aries. Connect it to your network, stream either your own content or whatever providers it supports (supposedly including Tidal), plug it into a DAC, and that's it. The industrial design isn't for me ¯\_(ツ)_/¯.
  9. and now for something completely different part 3

    Great work. Did you find that the bias current drifts at lower rails voltages also?
  10. The Headcase Stax thread

    Good grief. I posted about trying this pile of feces at a meet earlier. It could barely make a sound. At max volume, it sounded like a Carbon at about 9:30 o’clock. I made the mistake of plugging my 007A into it, and yanked out the cable about 90 seconds later when I realized that, considering it doesn’t work as an amp, that it probably got the bias circuitry wrong, too. Which seems indeed to be the case. How much damage do you figure I did to the diaphragms? 😱
  11. Beyerdynamic DT1770

    From long-term memory: the 280 is that lovely combo of hot treble and boomy bass that makes everything sound like a wood screw to the eardrums. I used it with a 2nd-gen iPod at the office (didn’t have fancy amps at the time), so it may improve with moar power (but I doubt it). It lived on my desk and I treated it well — the piece which snapped was the plastic extension on the inside of the headband next to the ear cup. It could not withstand the strain all headphones endure in that spot when you hold the cups apart while putting the unit on your head.
  12. Beyerdynamic DT1770

    I had a 280Pro about 12 years ago. Piece of junk. It’s brutally uncomfortable, painful everywhere it touches after 15min of use. It also causes listening fatigue within 30min if you can sit through the pain — probably hot treble, but I blocked it out of my mind. To add insult to injury, the cheap plastic where the cups connect to the headband will snap and break within the first month, as it can’t survive the strain of being put on and taken off the wearer’s head.
  13. and now for something completely different part 3

    Oh, I already have CFA boards... I thought you meant that you already ordered boards for the IRM PSU. If no one has those, I'll probably sit down and lay them out myself within the next few weeks, but I'm not very experienced at PCB design, so that might take a few tries before I get it right.
  14. and now for something completely different part 3

    @UFN: Yes! Would you mind sharing your boards?
  15. and now for something completely different part 3

    I was thinking about how to shrink the PSU for a small-chassis CFA build, and remembered @Kerry's mini-Dynalo. He used two Mean Well IRM-15-24 modules. Would that work for a 24V CFA?