TenoxVGA is an adapter that allows you to use a standard monitor to display ECL signals as used on the Atari TT (for which the TenoxVGA was designed) or other ECL systems such as Sun/2 (although you will need to interface between Sun 9-pin and TenoxVGA 15-pin plugs).

TenoxVGA was made by Antoni Sawicki, see https://github.com/tenox7/tenoxvga I had some boards made (making 10 is cheaper per board than making 1) and am only using one, so the others I am selling on tindie. I do not intend to make more, but you can do so yourself as Antoni made the whole project open source (hurray!).

I am selling the board only (with the components on there, it is not just a PCB). Apart from the computer, monitor and cables, you will need a 12V power supply to use the TenoxVGA. If you like you can 3D print a case yourself, you can find this on Thingiverse.