Cheers Dave,

Im not bothered about the tuner, its the Bluetooth and USB Im interested in.

The ground loop point is an interesting one.

Hopefully Ill get away with it.

I have in the past used a device (VHS?) Connected to mains via a 2 core mains lead and Its mono audio out connected to some sort of line in by just joining the inners of the RCAs together.

My mate said it would work, and it duly did!

I was really surprised!