I have a 2006 Azimut 43 Fly and simply cannot find anywhere the "black box" of the Simrad SR81 VHF radio needing attention. It is not where Azimut say it should be, behind a vertical panel in the guest cabin. Does anybody happen to have experience of this, please? I should add that I was unable to trace the wiring with a signal generator. It occurs to me that if I hold the transmit button down on one of the remote handsets, the central "black box", which is working and to which the antenna cable is attached, might give out some sort of local emission. It would be great if its possible to detect the position of that emission with a marine portable handset, a mobile phone, a walky talky, a mains ac detector or even a hand compass. I was off sick for the first few lessons in electricity at school. Any information will be gratefully received.