Today I found this strange device which seems like a DIY construction to me and I wanted to know what it is and what it does. It is connected to the lightning rod and it is also grounded to many points. Also, the thick black wire is going straight to an apartment. It is located near the lightning rod at the rooftop of the apartment building that I live. So can someone recognize this?
PS. I had more photos but I couldn't upload them cause of reputation restriction.