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  1. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    A thousand apologies to the people in this thread. I more or less left head-fi for a good couple years, satisfied with my audio equipment. Thus, when my tutorials disappeared off those free file sharing sites, I meant to transition to a permanent page on my personal website. It fell through the...
  2. joneeboi

    Carrie Amp v3

    There are a couple reasons why I tried this 2 channel design.   The Mini^3 was a design by amb and morsel, used with permission. I wanted to break away from borrowing someone's design into standing on my own two feet, so to speak. I know it's more or less a Cmoy circuit, but I still have some...
  3. joneeboi

    11th Calgary Head-Fi Meet Sunday May 31st, 2015 at University of Calgary

    I'll be there later today. Hope to make it by around 3 or 4, but hope I don't miss too many people. Super excited!
  4. joneeboi

    11th Calgary Head-Fi Meet Sunday May 31st, 2015 at University of Calgary

    @swich401 I don't know who else you messaged, but it would be worth contacting Edmonton head-fiers. Wouldn't be the first time Albertans traveled for a meet.
  5. joneeboi

    Carrie USB-Powered Headphone Amplifier

    Any chance for high res shots of the bottom side of the board? All that resoldering can't be good for those traces. From your previous posts, sounds like the TL750 and DCP are both working fine independently of each other.   When I put in a tantalum caps backwards, it went up in flames; it...
  6. joneeboi

    USB powered dac-amp musings

    00940, what's your take on the isolated grounds? When you connect signals L, R, and G from the DAC to the amp, doesn't that just end up circumventing the ground separation?
  7. joneeboi

    USB powered dac-amp musings

    Oh snap. I gotta work on my reading comprehension. 
  8. joneeboi

    USB powered dac-amp musings

    For my Carrie Amp proto run, OSH Park was about the same price as Imagineering per board, but I got mine in a week. Min 5 boards though. 4 sq in, so $20 per board plus $24 for ground shipping to Canada.
  9. joneeboi

    Carrie Amp v3

    How's it look now?   Joined both ground planes into one big happy family Symmetry for everyone! Removed all the bits related to rail splitting and regulation Switched from 12 V DC-DC converter to +/- 15 V version Isolated grounds again LC filter on power rails Added SO8 on bottom More through...
  10. joneeboi

    Carrie USB-Powered Headphone Amplifier

    Not your fault, Avro. That one's on me. 
  11. joneeboi

    Carrie Amp v3

    A guy takes a year and half hiatus and you go ahead and change everything on him? :D Presenting the Carrie Amp v3.     Yes, I'm back, and I've been silently toiling away on a new design for the past few weeks. Wow, it's great to see so many new and exciting projects here on head-fi; the...
  12. joneeboi

    Powering an opamp from USB

    Good to see I haven't been forgotten after a super long hiatus. :)
  13. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    Quote: It's posts like these that get me out of bed every morning. You're very welcome.    Quote:   diyMods to date have gotten by without the high pass filter. For safety's sake, it's best to do it with the filter as the capacitor will charge indefinitely without shunt...
  14. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    Some of you may have noticed that I've been extremely absent from the audio scene for a long time. I'm somewhat making a comeback to the hobby, and I finally fixed one of the broken navigation frame on my website. I'm also going to be moving the diyMod and Carrie amp information to a new...
  15. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    You're too kind, wgr73. I feel like I'm in the same situation since things picked up pretty quickly in school a year or two ago; I'm an electrical engineer. However, having just finished my last exam, I have a feeling I may need to occupy my time somehow. ;)
  16. joneeboi

    Carrie USB-Powered Headphone Amplifier

    Wow, it's been a while since I read this thread. Sorry to take so long to respond, FLACm0nkEy.   1) After all this time, I wonder myself why I used the switched pot. I was trying to limit inrush current, but I don't think I needed it after all. There's a better version of the pot with...
  17. joneeboi

    babyDAC

    I'm working on making this DAC work with 1206 and more realistic for building. If a person wanted dual differential, they'd need to use the Hammond 1455C120x. I could add a hardware jumper for pin 24, but it's already really hard to make things work. I'll try.   Also, I'd go 4 layers if I...
  18. joneeboi

    babyDAC

    Thanks for the comments, guys. I really appreciate the interest. It's going to take some time before I can even think about producing PCBs.   I also appreciate the detailed response, cobalt. I'm going to re-do with the layout with 1206 and a more realistic clearance. I'll try to throw as...
  19. joneeboi

    Ipod woes surprise surprise

    Part: http://www.amazon.com/Ipod-Touch-Headphone-Audio-Replacement/dp/tech-data/B00450DDDM   Guide: http://www.portatronics.com/guide/iPod-Touch-Repair-Guide/ipod-touch-headphone-jack-repair.html   Future reference: http://tinyurl.com/3ckx4ap
  20. joneeboi

    'Can Con' Sydney meet 10/07 Unique Melody, i-enjoy.com.au, Jaben Australia, Twisted Cables & Krispy Kables to join us~ Major prize giveaway by Jaben Aus~

    I'll be in Sydney between May 29 and 31. Is there no chance? :( I'll be in Australia for two weeks starting on May 29, so I'd like to be able to meet up with at least some head-fiers if possible.
  21. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    Quote: For the shunt resistor, I'd make it a high resistance such that any interactions would be minimized. Plus, if you're using an amp with input caps, maybe you'd do away with the capped LOD altogether.
  22. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    That type of advice is fine for experience modders, but there are many beginners walking in this thread, asking questions. Myself, I don't even listen to diyMods anymore. I almost exclusively listen to music in my car or with my iBuds, so I don't even use the diyMod much anymore. Nevertheless...
  23. joneeboi

    The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!

    There are two resistors that are associated with the Wolfson DACs, one in series, one to ground after the capacitor. The one in series, let's call it R1, is to reduce the voltage spike from connecting and disconnecting cables since TRS (tip-ring-sleeve) is deeply involved in all the diyMod...
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