It's called "Vintage", so your DAC goes with your threadbare tshirt and $250 ripped jeans.

  Might be wrong, but I think it's Hammond.

  I'd look at getting some solder wick and getting rid of the extra solder on the crystal oscillator. I had problems on my pupdac with too much solder on the oscillator shorting against the case (was so small I didn't notice it initially). USB hubs will disable devices if they draw too much...

  My interpretation was that the micas were part of a low-pass filter on the differential pair coming from the DAC, since the opamp has bandwidth well above audio frequencies... I'll defer to the actual designer though :)

  I stood at my workbench last night for two hours going through all the tracks that I gravitate towards when testing audio - it was hard to turn everything off and go to bed... I'm not unhappy at all for having to swap out the opamp - thank you for including both in the kit! As for power &...

  I checked the resistors and they were all in the right place. (I was being super meticulous, so it was a bit worrying to think that I'd maybe messed that up). I measured a bunch of point to point resistances around the opamp and they all summed to expected values. In the end I cut out the...

  hmmm... I was wondering if it was maybe a resistor mix-up. Both signals out of the opamp are very stable non-rail voltages. I'll check that when I get home. FWIW I installed the OPA2835 first - I'll swap with the OPA2836 if the resistors don't show up anything.   This project hasn't been my...

I put together my pupdac today, but it hasn't gone particularly smoothly... It recognises in Windows, all voltage test points pass, but I'm getting a very large offset of -0.5V on the left channel and -2.4V on the right. Hooking up the scope shows some audio signal, but at a very low level. I'm...

Excellent... gives me time to move into the massive money-pit my new house and set up a decent workbench for electronics.

If you are hand-soldering the GrubDAC, try approaching the pins end-on with a very small amount of solder. I broke a kit on my first attempt by being a bit sloppy. Some of the vias will punish you with bridges.

Yeah, I've just done a grubdac+PIMETA2 build in a slightly large Hammond case. I used 10mm hex spacers to mount the boards, however without a high-speed drillpress it's very hard to drill the holes exactly where you need them, even when using a centre-punch. Consequently the amp board has only 2...

Quote:   Looks nice! Are you using the perfboard to adapt the grubdac board to slots in the case?

No worries... a fresh set of eyes always helps!

Nice photos!   Is that a solder bridge on the top left of U1? One of the mini-USB pins looks like it might be a cold joint. I'd also check the right hand side of the top row of DAC pins in case there's stuff in there causing problems.   I hope you get it going - I destroyed one on my...

Here is the circuit I drew for the battery meter. Like I said, if I was doing this again I'd add a resistor in series with the scale set trimpot (on the V+ side) in order to make the pot range more useful. Both pots are (I think) 50k linear, R2 (LED brightness) is 2.7k, LED power bypass is...