Hello Ruud, E05-0901-05 is the kenwood part number. kenwoodparts.com not sure if they ship out of usa. VFO 9 Pin plug j umper pins 8 +9 ts 520/820 series Pins 1+2 have frequency signal for external display DFD/K + others The cable is 1-1 straight connect, pin #7 is not used. Easy to make your own cable. 73 james ke4drn