ВЭФ 12 (Astrad VEF 12 Project) - including a transistor tutorial

[Mark Hennessy]

Naturally, the voltage is nominal as there is a distinct "knee". But 0.6V is a good bet for a small-signal scenario like this - it might well be closer to 0.7V when significant base current flows, such as in a power application. But let's not worry too much about that right now...