I've built a 3 stage FM transmitter with NPN 2N3904 Transistors and I did the diagram in Eagle Cad and the board and then used the toner-transfer method for the traces. I have installed all components and the 3rd stage transistor(RF output) is getting really hot when you touch it. I scraped the enamel off the coil(5 turn/3mm) and thought that might have been the initial problem(didn't scrape enamel off initially cause it was the copper colored magnetic wire) but after re-installing the coil and putting a new transistor in thinking the other was damaged, it is still getting very hot, hot enough that after a few minutes hooked up to the 9V source, when I put my finger on it I have to remove it within seconds cause it's so hot. I am somewhat of a novice at creating my own circuits but i know what I'm doing as far as putting them together. Here is the link to the circuit I built. http://www.youtube.com/watch?feature=player_detailpage&v=ft7-bxCA0y4. Please help me figure out what's wrong or if it's normal. Do not have a frequency counter so can't test it that way as of yet but I am getting voltage across the coil and from B-C, B-E & C-E. I'm at a loss . I'll gladly do anything you ask to further help you help me with this regarding providing more information. Thank you in advance. JT