The A9 will not work with any futaba. The A9 is compatatble on the cord with the The low voltage Optic 6 or the Eclipse 7 Pro, not the original Eclipse Or another A9. Only the Hitec low voltage systems will work.

I choose to purchase my second A9 in order to access the increditable and heretofor unheard of buddy cord functions which has been a long time coming. Not avalible on any other system except on just certain combinations of expensive Futaba.

The only thing lacking with Hitec is a cordless buddy system such as the superb cordless buddy system avaliable for certain combinations of futaba.

The so called good old days (which were indeed awful and lost flying time due to bad combinations or dirty trim pots) of buddy cords that would fit multiple radio brands for whatever reasons does seem to be going away.

John