I need to calculate the current gain of a NPN BJT, and I have done an experiment where the voltage Vbe is increased slowly in steps and the resulting Ib and Ic are recorded. The voltage between collector and emitter is kept at a constant 5V. hfe should equal Ic/Ib, but I get very small values < 1 for hfe like 0.1, which seems wrong. In the data Ib goes from 10uA to 50uA, and Ic goes from .4uA to 5.7uA. Have I just done something completely wrong? or am I missing something?