White is not ALWAYS the signal wire. Other manufacturers of servos use a different color for the signal wire. JR, for instance uses a yellow wire for the signal wire, where Airtroincs Z's use a blue wire. It is true that Futaba has a white signal wire.

The power wires are different too. With JR/Spektrum, power + is orange and power - is brown. Airtronics and Futaba have red as the + power with black as the - power.

Just be aware of the differences. They all, however, should be interchangeable with each other on just about all popular receivers. The RX should be marked with some sort of symbol showing what pin is what..

The below diagram is what you MAY see on some RX's. (don't get all upset if yours is different, this is what you MAY see and symbolizes what pins connect where on the RX. Yours may be different.. or may not have anything at all. Check before connecting.

CGr.