Trainer cord warning from Hitec
http://www.hitecrcd.com/Support/TrainerCordWarning.htm
Important Information Regarding Trainer cord compatibility
To our valued customers,
While Hitec radios are known to be trainer compatible with other Hitec and Futaba systems, Hitec has determined that the two-way Futaba cord is not 100% compatible with our systems and strongly suggests it not be used at any time.
Our tests show that when the Futaba trainer cord is used with a Hitec radio the slave transmitter will emit an RF signal, thus creating a potentially dangerous interference situation, and in some cases will burn up components in the slave and or master radio.
Hitec suggests that only the one-way Hitec trainer cord (#58310) be used with Hitec radio systems for training. Failing to do so will void the customers warranty and could create a potentially dangerous situation. Hitec apologizes for any inconvenience this may cause, but the safety of our customers is our utmost concern.