center-tapped inductor
I think FmV means to put two wires together and wind them simultaneously. Then connect end of one to the beginning of the second. It will provide you with good center-tapped coil. Depends on the application such wiring may works well up to 5 Ghz at least, but better not use it for so high frequencies unless you are very involved in broadband design. What is important it is to keep all wires that out of the core magnetic field as short as it possible.