Hey guys, sorry to keep posting things about the NPN transistor but i think im starting to understand it. I was just wondering if you could confirm these facts for me: 1. An external powersupply is needed to turn the transistor on (by forward-biasing the emitter-base junction), or by using a resistor infront of the base to control the voltage flow into it 2. Once the transistor is on, a signal that is 'fed' into the base-emmiter will be amplified and come out of the emmitter-collector junction 3. If no signal is being 'fed' into the base, current still flows across emitter-collector and therefor out of the output 4. More of a question really, what sets the queisecent point of the transistor. Is it done by the manufacturer or by an element of the circuit?