Futaba FU8A07903 Micro-Micro Square-Square Trainer Lead - Compatible with Futaba Transmitters  [FU8A07903]

Trainer link - product summary

This accessory provides a direct wired trainer link between two Futaba-style transmitters. The Futaba FU8A07903 micro-micro square-square trainer cable is a low-profile, serviceable lead made to pair radios without extra circuitry interfering.

It is intended for instructor-student training exchanges and for situations where a simple, physical connection is preferred. Both ends use square-format connectors that mate with matching trainer sockets on compatible transmitters.

To install, insert each plug into the corresponding trainer socket. If recommended by your radio manual, ensure both transmitters are powered off when connecting or disconnecting, then select trainer mode on each unit prior to active use.

The cable does not alter programming or signal logic; it only forms the conductive path used by the transmitters' trainer functions. Keep the lead away from moving parts and avoid bending it tightly at the connector to maintain contact integrity.