I just bought a Futaba trainer cord, micro to round plug, to connect my 7CAP to a 4 channel T4VF. I have disconnect the battery and removed the TX crystal from the T4VF to use it as the student radio. No matter which trainer option on each channel of the 7CAP, 'F', 'N' or '-', there is no transfer of control with the trainer switch held up.

Is this TV4F compatible? Any idea what is wrong?

Adam