Built by MrX/MisterX.
Found the documentation. I will check on another computer tomorrow.
Thanks for your help!
I am interested in adding balanced out to the Gamma2 I'm building because I want to drive a fully balanced amp. I'm considering a Violectric HPA V181 to go with my Hifiman HE-500. I have a couple of questions. It's my understanding that one of the main benefits to running balanced is that by not having a common ground between the two channels, channel crosstalk is eliminated or at least significantly reduced. But it looks like the ground is shared for the balanced outs.
I'm just looking for a sanity check that I should wire the ground near the Right and Left positive and negative balanced leads to the ground pin in a 3-pin XLR.
My plan is to drill some holes in one of the plates and mount a pair of these mini XLR 3-pin sockets for Left and Right balanced outs, along with the serial 22uf caps and 100k resistors from the Right and Left positive and negative to ground as shown in the Twisted Pear Opus schematic. Here are the sockets I want to use. I'm looking for confirmation that these will fit. The back mounting nuts are 14.2mm diameter and the hole diameter for the socket needs to be 11.2mm. Will the nuts fit between the Gamma 1 and Gamma 2 boards? Since I'm not done with the build I don't know the distance between the two boards.
If this doesn't work, I'll run cables out of the case to some XLR 3 pin plugs.
Thanks for any help,
So sadly I am having issues with my y2 build... the y1 side works perfectly and i can hear music just fine. When I mate with the y2 board, all the voltage checks are fine (5V pin reads out at around 4.85ish, which I think would be ok?) Initially when I set it all up, I was getting music out of the stereo output of the y2, but then when I unplugged the usb and replugged it, the sound started dying and then just stopped altogether.
I would like to bypass the ASRC and see if I can test U5. Would jumpering JP2-n as well as lifting the input pins on U4 (pins 2, 4, 5, 6) be sufficient to achieve that?
I did try reflowing all the solder joints, although those ground pins have been making life difficult even with the iron turned up to 850F. Are there any other checks I might do? The fact that the y2 board is mated to the y1 seems to make some debug checks difficult.
Assuming you have the y2 fed by the y1 board, it should simply be a matter of setting the jumper on JP2D correctly. Look under the "Instructions" tab on the gamma1 page.
It's a combo and U1D is installed and JP2D is open. So, I guess it has to be something else causing the noise. It isn't hum, but static and hissing. The noise goes away when my CPU is at full power when benchmarking with Prime 95. If you close P95 the noise is there again... odd.
Also, when I'm using a different input, like optical, when I plug in the USB cable the noise instantly comes back.
Just noticed this too, should I replace that cap?
Thanks for the advice everyone.