Antennas
VHF Voice
Railroads utilize a variety of different antennas to transmit detector messages via VHF FM voice, almost always on the railroad's road channel where the detector is located. Which antenna is used often depends on railroad preference and when the antenna was installed.
1/4 Wave Whip
1/2 Wave Whip (Center)
Omni-Directional
Folded Dipole
Folded Coaxial (Center)
Folded Ground Plane
Low Profile Omni ("Ice Skate")