When you think of directional ham radio antennas, you probably think of a Yagi, cubical quad, or a log-periodic antenna. These antennas usually are in a horizontal configuration up on a high tower.

However, creating directional antennas allowed more stations to share channels and that’s the subject of a recent post by [John Schneider]. When it comes to antennas, ham radio operators often ...

A directional roof–mounted antenna can often help. AM signals are prone to interference by a variety of technical sources: other radio stations, power lines and computers. Lighting sources also ...