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  1. amc

    Are diy bookshelf speakers worthwhile on a budget?

    A bit bigger than the Martello's that pabbi1 made, but still quite tiny, I have completed some mMar-Kel70's and you could do that for 200 bucks all in.  Pretty hot little speakers - uses a single 4 inch full range driver with a paper...
  2. amc

    The state of solid state DIY amps

    This is pretty new - group buy ends tomorrow.  one board per channel http://www.amb.org/forum/alpha20-line-amplifier-f38/announce-new-alpha20-v2-t659.html
  3. amc

    Does anyone have the iPhone LOD pinout?

    Check the wiki - it has links to the original posts and some pictures that should help you figure out the orientation of the connector so you know what is pin one - on top or on bottom. http://www.head-fi.org/wiki/diy-ipod-line-out-dock-pinout   and if its not clear, you can always edit it...
  4. amc

    Raffle To Raise Funds for Flood Relief In Pakistan

    Thanks guys.  Appreciate your altruism.  Sets a great example...
  5. amc

    DIY iPod LOD Cables

    Good post - I like the image of the orientation of the connector and pinout diagram.  You can take your ground away from audio ground and attach it to the pin 11/15/21 bridge FYI - some people like this as it makes soldering a bit easier since pin 2/3/4 are so close together.   Also why not...
  6. amc

    The GrubDAC

    Thanks for putting the kits togther tomb, my order has been placed.
  7. amc

    The GrubDAC

    Quote:   If it is non-cable - you will be putting RCA's or a mini TRS jack panel mounted on the case, and the USB connector could be touching as well.  using metal panels, would there be any grounding issues?  Should the jacks be isolated?  
  8. amc

    How to make ipod touch LOD?

    Check out the wiki:   http://www.head-fi.org/wiki/diy-ipod-line-out-dock-pinout   The resistor is needed to prevent airplane mode comming on in an IPhone or a message about unapproved accessories I belive - in your case you may not need it - but I am not sure - never tried it with an...
  9. amc

    Hand Making Vacuum Tubes

    Quote: saw this on slashdot.org years ago.  Fantastic.  I think they said he is French.  So has anyone tried to source his tubes and perhaps design an amp using them?
  10. amc

    Millett "Starving Student" hybrid amp

    So,  My kit starving student is happily working away and I am enjoying it quite a bit.  I have one issue though.  I seem to get significant ringing or pinging in my cans if I touch the amp while listening.  Happens if I touch the heat sinks, the tubes, the volume knob, touch my source (Ipod), or...
  11. amc

    Diy Ipod Line Out Dock Pinout

    The Definitive Answer to the common Question:  "What is the Pin-out for a Line Out Dock for my Ipod Generation X?"  The answer is very suscinctly described - with pictures here.  This apparently works with G3 Iphones and is compatible with prior versions of the Ipod Classic and Nano.  Credit...
  12. amc

    Millett "Starving Student" hybrid amp

      Quote:   So after gathering dust on my bench for the last 5 months while there was a ban on melting lead in the house due to pregnancy, my 2nd daughter Ava has been born.  I pulled out this frustrating project and had a go at it with renewed enthusiasm and it is now working fine and...
  13. amc

    DIY starter kit

    Most people I would think start with a basic iron instead of a station to see if they like DIY or not. There are a lot of other tools to buy too so its a big outlay to get a station as well at the same time. Think you need to get things like wire cutters, flush cutters, solder, braid, helping...
  14. amc

    Been gone for a while, is m3 still good for DIY?

    Quote: Originally Posted by FallenAngel I'm a great fan of Par-Metal enclosures, though Hammond is the "simple and standard" option as it's super easy to work with and available in most electronic distributors. One thing about that Nabu (which I've used for my personal Beta22 build) -...
  15. amc

    help me build a frankenpod!!!!

    Quote: Originally Posted by suicidal_orange The line out of the dock is already analogue, that is it has already been through a DAC so no, you can't add a better one. You'd need to buy a wadia itransport to bypass the internal DAC, and that won't fit in your pocket! I have not...
  16. amc

    Closed Can Free-For-All (sub $200) for the workplace. Please help me.

    how about beyerdynamic dt770? Closed cans - some would say bass heavy 80 or 250 ohm versions. I love mine.
  17. amc

    Millett "Starving Student" hybrid amp

    Quote: Originally Posted by tomb Unless you can get us some pics that are in better focus: Concentrate on those MOSFETs - make absolutely certain that they are isolated from the case. Check all of your resistors - look at the rating designations and make certain that they're in the...
  18. amc

    Cleaning flux around SMT opamps

    hey. know how you feel. I did a y1/2 as my first SMD project. Your really gonna need flux. I used liquid rosin flux and it worked great. I also used TONNES of it. It makes the solder go where it needs to. Dont worry about cleaning. The parts are so small that your toothbrush will be able to get...
  19. amc

    Carrie USB-Powered Headphone Amplifier

    Watching and waiting. I will take 3 boards once your ready for a group buy...
  20. amc

    Millett "Starving Student" hybrid amp

    Quote: Originally Posted by tomb Yep.Near zero resistance if they're shorting. Near infinite resistance if they're not. I'm not exactly sure what you mean by "I read resistance. mica insulators are fine - you just need to use some heat sink grease between the mica and the MOSFET, and...
  21. amc

    Raffle To Raise Funds for Relief In Haiti

    Great Idea guys. I am in.
  22. amc

    Millett "Starving Student" hybrid amp

    Quote: Originally Posted by the_equalizer As TomB says, check the MOSFETs for shorts to the case (did you install the plastic shoulder washer between the nut and the MOSFET tab? ) I did install the washers but i really torqued down the heatsinks before reading about damaging the...
  23. amc

    We Got Ti Kan (AMB) an HD800!

    Im In. As a noob he let me participate in the Y2 beta.
  24. amc

    Millett "Starving Student" hybrid amp

    Quote: Originally Posted by tomb ...it looks like maybe R13 is not soldered on one end - that's the resistor up against the power input terminal block. That resistor divides the voltage supply between the two tubes and may cause some of your symptoms if it's not soldered. Thanks...
  25. amc

    Millett "Starving Student" hybrid amp

    Quote: Originally Posted by the_equalizer x2. And from several different angles... Are you sure you did not reverse the connection from the power supply? Off the top of my head, the tip or center of the PSU connector is positive (B+) and the ring goes to ground. cheers! Hi...
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