How does this work? TV antenna

Since your antenna is almost 30 years old, I would suggest replacing the whole assembly. Your present antenna is probably a Winegard Sensar II. The latest is a Sensar IV. The Sensar IV has an added UHF element that sticks out the front. If you decide to upgrade, check your present antenna and make sure there is room for the new antenna when it is stowed. The Sensar IV is considered the best RV antenna. Also make sure that your coax cable and connectors are in good condition.

Here's a link to a Sensar IV assembly on Amazon:
Winegard Sensar IV on Amazon.