Roland TR808 modern replacement power supply. Brand new. Selling as no longer required. 

Made by Synthtronics, Germany. Cost 250 Euro. 

I can provide link for installation info. 

An installed example of the Synthtronics TR808 PSU:

https://gearspace.com/board/electronic-music-instruments-and-electronic-music-production/1387638-roland-tr-808-owners-thread.html#post16147867