Futaba FU8A07903 Micro-Micro Square-Square Trainer Cable for Futaba Transmitters - Transmitter Accessory  [FU8A07903]

Compact trainer cable details

This transmitter accessory is designed for wired trainer linking between compatible Futaba radios. The Futaba FU8A07903 micro-micro square-square trainer cable delivers a simple, low-profile connection without adding extra electronics.

Use cases include instructor-to-student handover and supervised practice sessions where one radio temporarily transfers control to another. The cable has square-format plugs on both ends to match Futaba-style trainer sockets and works well as a reliable spare or basic hop-up for transmitter setups.

Installation is plug-and-play: insert each end into the trainer socket of the two transmitters. Power off both radios when connecting or disconnecting if your transmitter manual advises it, then enable trainer mode on each unit before flight or drive practice.

This lead does not change signal logic or programming; it simply provides the physical link used by the radios' trainer systems. Route the cable clear of moving parts and avoid sharp bends at the connector to preserve reliable contact during regular RC use.