It can be really hard to source vacuum tubes and proper parts in general. Here in Denmark we have a GIER 40/42 bit computer from 1961 which is kept in running

It can be really hard to source vacuum tubes and proper parts in general. Here in Denmark we have a GIER 40/42 bit computer from 1961 which is kept in running order by volunteers. This is the first generation without tubes. I made a few short videos (the last 3 on the page) of Henrik repairing the interface for the punched tape reader: http://datamuseum.dk/2013/04/torsdagsaktive-2013041/ http://datamuseum.dk/2013/04/torsdagsaktive-2013041/ Somewhere I have a video of it playing music via the console - but I cannot find it right now. They are truly fun beasts to play around with.