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this is the most astonishing thing I have read in a long time and I am CS not electrical engineering, so I have no idea what these drawings mean. I speak german, but I hope something works to translate this easily, as it is absolutely crazy. I did not know something like this was possible back then.

It is astonishing how advanced the world was back then...if it wasn't for this use though

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I would say understanding of the paper depends more on having an electrical engineering degree than a CS degree. The diagrams look to be electrical circuits and signal diagrams (I am not sure what is the correct term but for example 'Abb. 10a' in the article) mostly.

Check out the Analog Museum https://www.analogmuseum.org/

In particular this (German) presentation: https://www.analogmuseum.org/library/hamburg_hoelzer.pdf

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