The NEDSP1061-KBD Module is manufactured by bhi Ltd. and I got mine from WiMo Antennen GmbH in Herxheim, Germany.
The fitting instructions for the YAESU FT-817 can be downloaded from the bhi-site and here are the differences when fittig the NEDSP1061-KBD Module in the ALINCO DX-77:The modification is an easy job, as there is plenty of space under the top cover of the rig and no soldering has to be performed at the PC-Boards. The coupling capacitor has not to be removed and the DSP-Module can simply be inserted in the jumper wires connecting the Main Board with the Front Board.
The following pictures are self-explanatory:
Inside view with parts locations and wire routing
Detail of in-wire NF-Connections
Detail of keyboard on angle bracket
...and that's how the finished upgrade looks like!
For any questions concerning this upgrade please do not hesitate to contact email@example.com