BASIC RF OSCILLATOR

 

This basic circuit is easy to build and the components are not critical.most of them are found in your junk box
the L1 antena coil can be made by close winding8 to 10 turns of 22 gauges insulated hookup wire around a1/4 inch form such as a pencil.you can expiriment with size the coil and the no of turns to see how it affects the frequency and signal output of the oscillator you should be able to pick up its signal with a standard FM radio reciever.The signal in should be coupled by a disk capasitor of about 0.1nf to the stage in front of it