#33 Superlux R102 active ribbon microphone teardown & reverse-engineering

By sheer luck / accident, the other week i refreshed my Facebook main page (or "news feed" or whatever), and the first thing i saw was an ad from one of the trading groups i'm in, about a Superlux R102 (mk1) ribbon mic for sale, for a measly 30e (~$32). The seller was in a (sort-of-nearby) town i was headed to just a few days later, so i jumped at the chance. Immaculate shape, fully functional, retails for about four times as much - why not?