JCurtis,
Were you planning on placing a screening can over the ARF and regulator board assembly?
It's possible that we may see some self interference effects with digital noise injecting into the radio (with it being so close and not screened at all).. Tests so far seem to suggest this is ok , but it wouldn't surprise me if at some point some performance degradation is seen due to digital noise coming off the Raspberry PI PCB.
Self interference can sometimes be a bit of a difficult animal to track down (can be intermittent and also vary from unit to unit). A screening can over the radio would be a good idea.
rgds
Andy
I was looking at just making the Pi shield with voltage reg to power the ARF, so people would still need to attach that as described before (I would supply the pin headers etc.). It just does away with all the wiring and makes it easier to mount.
Naturally I could also include a mounted ARF unit too which would save people getting out the soldering iron.
Once I have some bits here I can do some EMI tests to see if there is anything going on which may impact the performance. The problem with using cans is finding an off the shelf one of just the right size, and then I would have to also make the shield with ARF as a prebuilt module.
I also noticed that within the ARF documentation on the website it says "The ARF is not 5v tollerant, use 3.3v logic and power", so I might also look at adding a logic level shifter to go between the 5v logic of the Pi and the ARF, just to keep everything within spec.