Purchased new in 1985 when I moved away from New York City
but still wanted to listen to a NYC radio station.
It has been in a box since 1988 or so.
Used to help pull in far-away AM stations.
This antenna does not 'connect' physically to anything.
You put it close to your existing AM radio or AM antenna
and 'tune' it by turning the dial.
It alters the electro-magnetic field around your existing AM antenna.