The transmission has been running for 63 years. The question is not who is sending. The question is from where one hears it.
MONITORING LOG – THE STATIC ROOM BUREAU OF COMMUNICATION STANDARDS, basement OBJECT: sealed concrete cube, 4.41 by 4.41 metres, steel door locked since 2115 LEVEL READING: 441. For sixty-three years. The meter has been replaced four times. The value has not. STATUS: Inspection is scheduled annually. It fails annually because the key lies in a different drawer than expected. The Bureau has numbered the drawers. The key has not abided by that. PRELIMINARY REMARK OF THE BUREAU The radio equipment in the room transmits. It was switched off in 2115, sealed and disconnected from the power supply; the record exists, with three signatures. It transmits nonetheless. The walls are doubly reinforced exposed concrete, sixty centimetres, lined with copper mesh which according to the construction plans is to ensure "electromagnetic isolation". The plans do not specify whether the isolation is to keep the signals in or keep them out. The Bureau has submitted the question for clarification three time...
From the lore of Velgarien.