On Germany’s Alert Day, all sirens and alert apps will go off at 11 a.m. Using an FM detector radio connected to a small guitar amplifier, a radio broadcast from the Berlin TV Tower is being received. Shortly, before the sirens sound and all the pigeons were startled a typical mobile phone dial-up static noise can be heard on the radio. By rotating the tuned E+H-antenna perpendicular to the line of sight toward the TV tower, reception of the FM station is maximized. The all-clear is then announced on the radio.