Until the late 1980s, the German PTT (Deutsche Bundespost Telekom) trained apprentices from just after high school age about fixed and wireless telecoms and electronics. Also it appearsthat could join them for National Service rather than go into the military if you didn’t want to do stuff related to war (although that did mean 3 years rather than 2).
A kind old “Onkel” who is now retired (along with his friends of similar age) has hoarded all the text books, learning material and info and scanned them to an Internet site. This has been done with full approval of Telekom, BNetzA, Ms Merkel and another formidable older German lady (who has the copyright for half of the DBP archive for some unknown reason)
Be careful (Achtung!) It starts from 1925 so as a few of them contain front covers you may not approve of (for obvious historical reasons). I was surprised those also got on the site as you need authoritsation from BNetzA to put anything from that era on a .de website , in any case they are in the traditional 16th century blackletter font which isn’t easy to read (newer stuff is in Helvetica)
It is all in German. But you only need to have a teenagers knowledge of the language or if you know Dutch, it is mutually intelligible to some extent.
Startseite
the learning materials are here. Unless you for some reason want to not just learn about old telegraphs, valves and do so in German, look at the ones around the 1980s. The technology then is still in use today, albeit often on a single chip ratjer than individual components. There are also German text books if you need to brush up on the language (be aware they changed the spelling yet again in 1996!)
Lernmittel
