Complex sentence: What is happening is that the radiowaves from the clean transmitter are interacting with the'rusty bolt' which acts as a diode this rusty object then reradiates the radio signal with some harmonics or other unwanted signals.
Split into simpler sentences: What is happening is that the radio waves from the clean transmitter are interacting with the'rusty bolt' which acts as a diode. This rusty object then reradiates the radio signal with some harmonics or other unwanted signals.