Eurovision Season is starting

I don’t understand a word of this, but the central tenants of Geek hardware and reproduction are universal:

According to Bruce Satchwell, hardware and radio geek from the Gold Coast, this is an example of a weird European hobby called Amateur Radio Direction Finding.

I wonder if this hobby started like archery in the 11th through 13th century in England? English archers were revered through Europe due to their prowess. This was developed in villages from a young age. Maybe during the Cold War eastern bloc countries had their young radio geeks make RDF devices to stop the Capitalist west airborne intruders? I wonder.