I've been looking into building an FM transmitter recently and discovered audioguru's Mod4 circuit. It seems to be one of the best on the internet (I've searched through a lot)! I will be using the stereo input addition, and I am wondering what kind of wire I must use for the coils. I know enameled copper wire is usually used but I can't seem to find where to purchase it or get it from another device. I also read that normal #24 AWG hookup wire can be used. Is this true? And if so, will performance be affected if I use it? Finally, is it okay if I power the whole circuit from 5 volts (including the last part). I am guessing that the output range will simply be less.