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Gamma-2 (γ2) DAC Thread - Page 142

post #2116 of 2139
Quote:
Could you maybe assist in which places on the board I should tap?

 

 

 

http://www.amb.org/audio/gamma2/gamma2_v100_pcb_top.jpg

 

 

See the labeled holes by C10?

post #2117 of 2139
Quote:
Originally Posted by MisterX View Post

 

 

 

http://www.amb.org/audio/gamma2/gamma2_v100_pcb_top.jpg

 

 

See the labeled holes by C10?


OH Awesome! I totally missed that! And what do think i should add in line before the XLR?



I was thinking of following the Opus DAC schematic. 22uf caps, and 100k resitors to ground for each, will that work?
Edited by DutchGFX - 5/3/13 at 12:20pm
post #2118 of 2139
Quote:
22uf caps, and 100k resitors to ground for each, will that work?

 

Yep, that will work.

post #2119 of 2139
Quote:
Originally Posted by MisterX View Post

Yep, that will work.

Sweet, ordered some resistors and the OPuS caps, will drill holes in back prolly. Thanks for your help! Ur the man!
post #2120 of 2139
Ugh my gamma2 randomly started getting a "not recognized by windows" error. Research showed that its probably a blown chip.
post #2121 of 2139

Unsoldering that chip is a pain, I had to use a small blow torch. Have you double checked/reflowed your solder around the chip and usb adapter?

 

Quote:
Originally Posted by shrimants View Post

Ugh my gamma2 randomly started getting a "not recognized by windows" error. Research showed that its probably a blown chip.
post #2122 of 2139

If you need to remove the chip, look into some chip quick.
 

post #2123 of 2139

Hey I'm sorry to be asking questions like this but how much does the PCB and all the components cost to buy for both the y1 and y2?  My neighbor is an electrical engineer and could probably put this thing together with his eyes closed.  Also, how much of a difference does a dedicated PSU make compared to a normal walwart or powering it by USB? Would you guys say it's worth the extra work/money?  I plan on using this with a Lake People G109 and HD600s and then eventually LCD 2s hopefully

post #2124 of 2139
Quote:
how much does the PCB and all the components cost to buy for both the y1 and y2?

 

 

Roughly $230.

post #2125 of 2139

Sorry if this has already been asked, but is it possible to build a gamma 2 without assembling the USB board on the gamma 1?

I'm not going to use the USB input at all, so it would be relatively pointless for me to build it if it isn't necessary.

post #2126 of 2139

Sure, you could build a Y2 without a USB section.

There are no ready made panels available for that configuration though.

post #2127 of 2139

I have a gamma2 which is making humming noises when using USB connection with my desktop computer but not when connected to my laptop. SPDIF/coax and external power works fine.

 

Possible ground loop? What steps can i do to fix it of find the problem?

post #2128 of 2139
Start by testing your test points with a multimeter. Specifically the ones around the USB chip and the voltage regulator there. Also they other USB port non a different computer. Mine makes a humming when I use my gf laptop because of the USB port itself. Its fine otherwise.
post #2129 of 2139

I will do that, but what should i look for? 

post #2130 of 2139
Quote:
Originally Posted by Tautologi View Post

I will do that, but what should i look for? 

Have you read the documentation on the AMB website? There are test points all over the device, you are testing those test points with a multimeter. The test points are labeled with a voltage, and that is also visible on the website. So logically, you are looking to see if the test points are all reading the correct voltages.

But first try on a different computer.

Did you build yourself or what?
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