How to radiate a positive oscillating voltage?
What did I do wrong?




The minimum recommended supply is 10 volts between positive supply pin and negative supply pin. You are using 5 volts according to your circuit.

Also, to make an effective monopole antenna you will need a ground connection or at least a few hundred pF capacitance to real ground.

Check that the circuit oscillates using an oscilloscope. I doubt that it will with a TL072 and a 5 volt supply. Be also aware that when you do get it working you might really annoy neighbours who are listening to their radio and you might contravene local laws on illegal radio transmission. I would suggest you use a ferrite rod and coil as you transmitter antenna as this has very poor penetration range due to it only producing a magnetic field and not a full-blown EM field.