Is this correct? If it is then I think there's a problem. I've wired it as per instructions on websites for Nato 2000 etc ie: Secondly, I've bought a Sadelta Echo Master Pro from fleabay. It's got Black, Red, White and 'Screen' wires, but which wires go to which number on the 4 pin plug for wiring it to a Stalker st9fdx etc? (I haven't got a meter so can't check which is TX RX etc like on the wiring sites). There's a couple of things I need help with if you don't mindįirstly, I need to put a plug on my Stalker mike (got no Stalker to put it onto though ).