We've discussed this since the V2 days as both of the models suffer from the same issue. There is no shielding whatsoever inside this mass-produced radio which causes all sorts of issues. Mitigating internally generated noise can be accomplished by shielding the DSI cable, replacing the buck converter with a shielded one, making a shield cover for the RF input area, grounding unused pins, etc.
?
?
-JJ
