Recent content by cotdt
  1. cotdt

    Got a lot of free time? How about helping finish a B22 build?

    Quote: Originally Posted by nattonrice Have you considered conrad heat sinks as an alternative to the cnc work? If you cant find someone with free access to one then that might be the cheapest "best fit" option~ Conrad heatsinks seem more expensive to me. Doing it custom, it was...
  2. cotdt

    Beta22 heatsinks

    I used custom CNC'ed heatsinks especially designed for the Beta22 boards and the specific casing. It seems to be the only way to do it. I did 8 heatsinks for $50 in raw material. Pics: http://www.head-fi.org/forums/f6/got...7/#post5808989 Don't forget that the amp modules themselves...
  3. cotdt

    Got a lot of free time? How about helping finish a B22 build?

    Quote: Originally Posted by penger Hope you get well soon and good luck finding a builder. Wondering what a beast it'll look like. Pictures? =P Thanks man! Here are some pics: This is a pic of one of the amp modules with custom CNC'ed heatsink installed:
  4. cotdt

    Got a lot of free time? How about helping finish a B22 build?

    Hi, this is a very max'ed out Balanced Beta22 but I recently developed a skin disease and can no longer finish the amp. This Beta22 is set to output the maximum amount of power and therefore uses custom CNC heatsinks and fancy casework. Two more Sigma22's need to be heatsinked with custom CNC...
  5. cotdt

    How to 'brush' aluminum?

    To get an even finish, I just polish the aluminum with fine sandpaper and then put it in strong Phosphoric Acid.
  6. cotdt

    y1 gamma-1 DAC

    Quote: Originally Posted by rhys h I wish i could get balanced output from this thing! I dont want to see it go so soon Poor you... <mod edit>
  7. cotdt

    Case screws on an SP MPX3

    Yeah it's 1/16" I've got a bunch of these screws if you want some
  8. cotdt

    How to equalize your headphones: A Tutorial

    Quote: Originally Posted by vvanrij The dac can never perfectly recreate it coming from this 'imperfect' source. Else there would never be a need for a better quality source (eg 24 instead of 16 bit etc.) You lie!
  9. cotdt

    Nikon Film SLR suggestions

    Quote: Originally Posted by KLS auto-focus. what's that? never hearda it
  10. cotdt

    High voltage electrolitics: Mundorf M-lytic, Nichicon Muse NT, Jensen, or JJ?

    For power supplies, low ESR is the key to clean power. Those audiophile caps are designed for coupling stages. They do have low ESR but it's such a waste.
  11. cotdt

    High voltage electrolitics: Mundorf M-lytic, Nichicon Muse NT, Jensen, or JJ?

    For those small values, you can go for a film capacitor, or an oil capacitor. I've had electrolytics in the output stage of single-ended amps and all of them sounded mediocre, even "audiophile" ones. Going to film was a huge improvement.
  12. cotdt

    Getting a Zhaolu D2.5A (AD1852), want to get a balanced output stage

    Another option: You could also make your own Zapfilter for something like $30 with BC550C/BC560C and BC337-40, and power it with the Sigma22, which is MUCH, MUCH cleaner than the stock power supply.
  13. cotdt

    Getting a Zhaolu D2.5A (AD1852), want to get a balanced output stage

    Quote: Originally Posted by nikongod The DAC chip in the 2.5C is much nicer then the DAC in the "a". I would get a C before hacking up the zhaolu. Really? I like the A version much better than the C version, I think it is the more accurate sound, the AD1852 is what converted me...
Top