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Gamma-2 (γ2) DAC Thread - Page 5

post #61 of 2085
6/29/09 at 4:55am
UglyJoe, sorry, the answer is no. The opamp actually uses the VADD/2 DC offset from the DAC as a bias, because it's powered by a single supply. We don't want to block the DC there.
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post #62 of 2085
6/29/09 at 5:53am
You mention in your recently updated post #2 that the Y2 accepts the unbroken Y1. I'm guessing that if we already have a Y1 with the boards broken and assembled that they can be taken apart and used here the same as an unbroken board.
I really like the Box case chosen to house this DAC, and the fact that it comes in many colors. When and if the time comes I look forward to participating in another GB for the faceplates.
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post #63 of 2085
6/29/09 at 6:09am
Yes, to prevent the (broken apart) γ1 boards from sagging in the middle, pad the bottom with some foam.

you could also join back the broken-apart γ1 boards if you want. There is a row of vias (small holes) at the edges, through which you could insert cut-off resistor leads to link the two boards and then solder them down.
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post #64 of 2085
6/29/09 at 6:17am

Calling for prototypers

We are still seeking prototypers to join the team. See post #37. PM me if you're interested.
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post #65 of 2085
6/29/09 at 6:18am
Quote:
I really like the Box case chosen to house this DAC, and the fact that it comes in many colors.
I'm glad someone does because I see it as nothing more then a PITA.

"Can I get a ready made Gamma 2 DAC in a red, green, blew, silver or gold enclosure?"
No.
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post #66 of 2085
6/29/09 at 6:38am
Will AMB be supplying these cases? They might be difficult to get hold of if you're not living in the USA.

It looks like the PCB will almost fit in the smallest of the hifi2000 cases, the Galaxy GX143. Even worse, if that's true then the smallest case that would fit this dac, is going to be the far too large GX247 at 230mm x 170mm.

Maybe it wont be so bad since it looks like the dac would fit quite nicely into a good old hammond 1455 series - 120 X 103 X 30.5.
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post #67 of 2085
6/29/09 at 6:42am
Quote:
Originally Posted by MisterX View Post
"Can I get a ready made Gamma 2 DAC in a red, green, blew, silver or gold enclosure?"
No.
haha this is gold~
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post #68 of 2085
6/29/09 at 6:46am
Quote:
Originally Posted by Mr.Duck View Post
Will AMB be supplying these cases? They might be difficult to get hold of if you're not living in the USA.
I don't plan to stock any cases, but when the production board is released, I could help anyone order them and send along with the PCB and parts.

P.S. btw, the Box B2-080 series is available from RS Components outside the US.
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post #69 of 2085
6/29/09 at 7:17am
There is a limited selection available at Farnell as well (# 1015173 for the black version)
there is a "Multi Comp" branded version as well but that one is only avilable with a silver finish
http://www.farnell.com/datasheets/32964.pdf
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post #70 of 2085
6/29/09 at 7:45am
Since the usb board handles both i2s and power output, the y1's dac board doesn't need to be populated for a usb-only config, right?

And of course, if you can't get the box enclosure for any reason at all, there are a variety of other manufacturers that make extruded chassis with 100mm pcb slots(if you don't mind jumpered, or panel-mounted switches). From what I can remember, hammond, LMBheeger, context engineering, lansing enclosures, ampboxaudio, elpac.de, lincolnbinns, and more I'm sure have such enclosures.. I assume none of the jack's on the y2 board are threaded, so you'd have to put something in back to keep the board from sliding.
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post #71 of 2085
6/29/09 at 8:06am
Quote:
Originally Posted by JamesL View Post
Since the usb board handles both i2s and power output, the y1's dac board doesn't need to be populated for a usb-only config, right?
You could skip populating (virtually) everything on the γ1 DAC board, with the caveat that you won't have support for wallwart power, S/PDIF inputs, or the "second" DAC (the WM8501). This would be the γ1 "lighter-than-Lite" config, lol. Anyway, in such a configuration, you still need to populate the JP1D 2-pin header on the γ1 DAC board, the J3 receptacle on γ2, and install a jumper across JP1 on γ2.
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post #72 of 2085
6/29/09 at 8:20am
Quote:
Originally Posted by amb View Post
You could skip populating (virtually) everything on the γ1 DAC board, with the caveat that you won't have support for wallwart power, S/PDIF inputs, or the "second" DAC (the WM8501). This would be the γ1 "lighter-than-Lite" config, lol. Anyway, in such a configuration, you still need to populate the JP1D 2-pin header on the γ1 DAC board, the J3 receptacle on γ2, and install a jumper across JP1 on γ2.
Haha alright. Well, features are nice but I think I'll keep this next build simple
I wish I could join the prototype team, but I don't have any equipment with me now, and as per my experience with the y1 prototype, I didn't really have anything important to contribute anyways other than the fact that I got it working :P
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post #73 of 2085
6/29/09 at 8:46am
Nice to hear that you got your prototype working.
Chip quik FTW?
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post #74 of 2085
6/29/09 at 9:11am
Quote:
Originally Posted by MisterX View Post
I'm glad someone does because I see it as nothing more then a PITA.

"Can I get a ready made Gamma 2 DAC in a red, green, blew, silver or gold enclosure?"
No.
You're just going to have to adopt the Henry Ford view on colors...
"You can have it in any color, as long as it is black.."
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post #75 of 2085
6/29/09 at 9:22am
Quote:
Originally Posted by MisterX View Post
Nice to hear that you got your prototype working.
Chip quik FTW?
Lol yeah. Thanks for that suggestion, it came in handy more than once
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