Simple circuit to listen to aircrafts

 

First of all I must say that we give this circuit with the educational purpose If you missed used this circuit we don't get the responsibility of it.Most of the viewers sent us emails asking RF circuits like this.Here we have used common transistor 2N918.To make L1 wind 2 turns of 22 AWG magnetic wire on a 5/32 steel bolt

 #  This circuit Can be operated with 9V
 #  Build this circuit on a PCB