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  1. KimLaroux

    Carrie Amp v3

    4 years later... Its working. But it has really audible high pitched distortion and noise. That's when powered straight from my desktop, or trough my powered USB hub. Dunno if it's coming from the GrubDAC itself or added later on by the v3 amp. Ah well. At least I can shelf this project in...
  2. KimLaroux

    Head-Fi Meet Downtown Montreal 2015 AUGUST 30TH DATE CONFIRMED

    I'm a sad kitten. =(   I bought the Android cable for my Momentums, but it's not compatible with my Moto G. So I think it's time I upgrade my phone. Any of you have an iPhone or a Samsung Galaxy I could try my remotes with, confirm that they work? The box of the Android cable says it's...
  3. KimLaroux

    Head-Fi Meet Downtown Montreal 2015 AUGUST 30TH DATE CONFIRMED

      That's great! Thanks!   I'll wait to receive my USB OTG cable and confirm I can use my smartphone as source. Otherwise there's no much reason in me attending.
  4. KimLaroux

    Sennheiser Momentum On-Ear Impressions

    Wow!!    These scale surprisingly well! Listening to them right now out of my Audio-gd NFB-12 and they SHINE. With electronic music they are by far the best headphone I own. That bass is so perfect.
  5. KimLaroux

    Head-Fi Meet Downtown Montreal 2015 AUGUST 30TH DATE CONFIRMED

    Is anything in this pile of junk of any interest to you peeps? I would not want to carry all that out of the island through bus transit just to have it sit in a corner in need of love.      I sadly don't have a laptop anymore, so I just ordered a USB OTG cable. I'll try to hook my DAC to my...
  6. KimLaroux

    Sennheiser Momentum On-Ear Impressions

    I bought a new, larger purse to carry these around with me at all time. I think that speaks for itself.   
  7. KimLaroux

    Carrie USB-Powered Headphone Amplifier

    Holy smokes! I never realized those capacitors had a polarity! Nice find! I'll switch them the right side tomorrow. Thanks a lot! :D Hopefully my ldo is not fried and will still work after that...
  8. KimLaroux

    Carrie USB-Powered Headphone Amplifier

      OK I'll go digging trough some data sheets tomorrow.   If there's no way to have more than a guess-timate on how much current my headphones draw, I'll just take my amp meter out and test them. That should work, right?
  9. KimLaroux

    Carrie USB-Powered Headphone Amplifier

      Ok noob questions: How do I calculate the quiescent currents and the current of the load?   I'm guessing if I can find the output RMS voltage at normal volume, and the impedance of the headphone, I can calculate the load current. But how do I find the RMS output voltage?   I'm clueless...
  10. KimLaroux

    Carrie USB-Powered Headphone Amplifier

      Lol. If you see a big mushroom cloud East of your place, and that I never report back, you'll know the experiment will have failed.    No but seriously. If I don't get more data on the specifications of the Carrie I won't fool around and order the 750L10. It's just twice the price.
  11. KimLaroux

    Carrie USB-Powered Headphone Amplifier

    Ok I give up. Plan B: Is it safe to replace the 750L10 with a 78L10? The later has a current capability of 100 mA compared to 150 mA for the 750L10. I searched the thread but can't find a consensus on how much current the Carrie draws.
  12. KimLaroux

    Millett "Starving Student" hybrid amp

      That's what I figured... But I felt obliged to clarify things in case he was using the same mod but on a 12AU7 build. 
  13. KimLaroux

    Carrie USB-Powered Headphone Amplifier

    Anyone has got one or two TL750L10CLPR to spare? I don't feel like paying 20$ of shipping for a 0.82$ part. =/
  14. KimLaroux

    Carrie USB-Powered Headphone Amplifier

    Meh. Very meh.   I thought for a moment the problem could be the capacitor bank being too big, but even directly powered from an ATX PSU all I get out of the DCP - and the LDO - is 2.7 V.   I removed the LDO and the DCP outputs 24V. I'm hoping it's just the LDO that is blown, so I'll order a...
  15. KimLaroux

    Millett "Starving Student" hybrid amp

      Actually 12.6 V for a 12AU7 build.   The pins are not connected together as there is no dot on the schematic. They need 12.6 V across them. You connect one pin to ground and the other to pin 3 of the MOSFET.
  16. KimLaroux

    Carrie USB-Powered Headphone Amplifier

    And with the huge capacitor banks on the carrie, it's to be expected. I'll try powering the carrie straight off an ATX PSU. This should answer the question.
  17. KimLaroux

    Carrie USB-Powered Headphone Amplifier

    I got a new desktop computer running Windows 7 so I'm giving this another try... If I plug my GrubDAC alone in the USB port, without the carrie, it's recognized and I guess works fine. (I don't have plugs connected to its audio output so I cant test it) I think the problem is with the Carrie...
  18. KimLaroux

    The GrubDAC

    The DAC powers fine... I think the problem is with the Carrie, so I'll be moving this discussion over there. Here's why I think so: I added a power switch between the carrie and the dac. When I plug the DAC in with the switch open, the DAC is recognized: 1460.483019] usb 6-2: new full-speed...
  19. KimLaroux

    The GrubDAC

    So... I bought a new desktop PC with Windows 7 and it doesn't even detect my GrubDAC... this is sad. =(   I'm clueless when it comes to Windows. How do I go about debugging this? edit: I booted on a fedora usb stick and dmesg floods me with this: [ 209.924022] hub 6-0:1.0: connect-debounce...
  20. KimLaroux

    Millett "Starving Student" hybrid amp

      http://www.valvewizard.co.uk/Grounding.pdf
  21. KimLaroux

    Millett "Starving Student" hybrid amp

    I was in awe of your dead-bug soldering until I noticed you're using the steel case as a ground return for both power and signal. Heresy! D=
  22. KimLaroux

    Shure SRH440 Impression

      I prefer my modded SRH440 over my Q701 my a large margin. They have better bass, better resolution and a more enjoyable response curve than the Q701. They are more comfortable and block outside noise better by being a sealed headphone. But I was still talked down in my first days on this...
  23. KimLaroux

    Carrie USB-Powered Headphone Amplifier

      2V, like the input of the LDO. I tried removing the LDO and the DCP did output enough voltage, around 14V if I remember right. It just falls for 2V when I put the LDO in.
  24. KimLaroux

    Post a picture of your Headphone Rig.

      I made it myself. It's an hybrid design based on the Starving Student and the SOHA II.   And thank you. I like when things match. =)
  25. KimLaroux

    IC: Montreal, Quebec Meet!!!

    Have you tried contacting ItalMelodie or Audiophonie? Maybe one such store could lend us a room, and use the opportunity to create an advertising campaign/event. It could be a win-win situation. You just have to convince them that it could be a business opportunity.
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