The same guy of this website also sells a modern version of the Telefunken mainframe, see <a href="https://analogparadigm.com/" rel="nofollow">https://analogparadigm.com/</a> and an arduino-like version, see <a href="https://the-analog-thing.org/" rel="nofollow">https://the-analog-thing.org/</a> Both pop up at HN from time to time.
In the same vein, Ars Technica did an amazing story on analog computers in the US Navy a few years ago:<p><a href="https://arstechnica.com/information-technology/2020/05/gears-of-war-when-mechanical-analog-computers-ruled-the-waves/" rel="nofollow">https://arstechnica.com/information-technology/2020/05/gears...</a>
Dude in my town had a mid-60s Telefunken van. I was maybe 12 years old (late 70s) when I'd see it driving around. It was lost on me, but I appreciate the memory.