OK - next we need to attach the USB pigtail ...
The first thing you need to do is print the grubCableDAC page. It shows you a convenient legend for the wire colors of a standard shielded USB cable and where those wire go on the grubDAC PCB. Here's my printout below, with the grubDAC and the RCA leads attached.
![](http://www.diyforums.org/GrubDAC/construction/buildthread/gd45-sm.jpg)
What's nice about the USB pigtail cable is that it comes with the wire leads pre-tinned, including the shield and ground cable. There's no stripping, no cutting, etc. - just simply push them through the proper holes and solder.
Note: Only the right-most USB connector tab hole is grounded. Use that one for the shield/ground wire connection.
![](http://www.diyforums.org/GrubDAC/construction/buildthread/gd46-sm.jpg)
Cobaltmute designed the grubDAC specifically for the Hammond 1551HTBU plastic translucent case. The only thing you need to do is cut a slot in each end for the RCA leads and the USB cable, then screw the PCB into the case. Very simple! Don't look too closely at the pic below - I marked mine with holes that are way too big! I think the first prototype I made had much larger leads. So remember the old adage - measure twice, cut once. Still, this should give you an idea of how simple is the task. I found a good bit on my Dremel Moto-Tool and the slots were cut in few seconds.
![](http://www.diyforums.org/GrubDAC/construction/buildthread/gd47-sm.jpg)
![](http://www.diyforums.org/GrubDAC/construction/buildthread/gd48-sm.jpg)
Next - screw the PCB into the case using #2 x 1/4" self-tapping screws. Note the cable ties on both cables to act as strain reliefs.
![](http://www.diyforums.org/GrubDAC/construction/buildthread/gd49-sm.jpg)
Finally - screw the lid down with the two Hammond screws. FINISHED!
![](http://www.diyforums.org/GrubDAC/construction/buildthread/gd50-sm.jpg)
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