The RCA leads are acting as antennas to pick up the AC hum from the AC adapter. You can probably eliminate it by connecting the AC adapter jack's ground to the RCA jack grounds inside the dock -- by default they do not touch anywhere in the dock.

EDIT: Yup, that was it.. I just tried this on a dock here. Any future docks I make will have this connection wired in from the factory.

Cheers


Edited by mlord (26/02/2004 12:27)