Last question for today, it is already very late... So here it comes:

So, R(3) = 10kOhm, U(BE) = 0.7 V , B = 200

My question is, I have painted exactly the same equivalent circuit and therefore I assumed that U(BQ) = U(Th). I doubt that it is a typo, because U(Th) ≈ 1.870026525 V and he wrote down 1.771 V. So what exactly is the difference ?

I hope, I didnt bother you to much today! In case, I forgot to translate sth, please let me know, I will fix it right away.

Tobias