I see; I will always use one then.PS. We always need RB resistor
My next problem is with the voltage divider to bias the base. I find it a bit hard choosing the right values taking into account the Ib current. I mean, getting the right bias voltage is easy; where I struggle is in calculating the current that will go into the base.
At this point I have to confess that I'm a bit rusty in maths; and this is probably slowing me down a lot.