Hello all, IMHO it is not going to work, because on a 40 pin IC socket the pins 1 and 40 will be adjacent on the ribbon cable, and in the header 1 and 2 will be adjacent. You would have to separate the cable into two parts of 20 pins, turn them accordingly and place them in the 40 pin male adaptor to the IC socket pins, but you will still have the double distance between the connectors' pins. Greetings, Jochen Feldhaar DH6FAZ jf@detektor.de