Hi guys, I'm currently constructing a Colpitts oscillator based on NPN 2N2222. Here I use the NI MultiSIM 9.. It works perfectly, however, I get nothing when construct actual circuit (on breadboard) In the real circuit, the inductor is replaced by a coil inductor of 18SWG(1.25mm) diameter coiled to the value as in simulation. I've also tried other circuit samples on the internet, but still no prevail. Is the coil diameter too thick? Can you all please help me out? Thanks a lot. Appreciated.