What is the approximate bandwidth of a VHF repeater FM phone signal?

The approximate bandwidth of a VHF repeater FM phone signal typically falls within the range of 5 to 15 kHz. This bandwidth is sufficient to accommodate the audio frequency range of human speech while allowing for the necessary frequency modulation required for clear voice transmission.

In the context of VHF (Very High Frequency) communication, FM (Frequency Modulation) is utilized primarily for voice communication, and the specified bandwidth ensures that the sound quality is adequate for effective communication. This bandwidth also helps minimize interference with adjacent channels, maintaining clarity and reducing the risk of cross-talk between repeaters operating in close frequency proximity.

The other choices do not reflect the standard bandwidth used for VHF repeater FM signals. A bandwidth of less than 500 Hz is far too narrow for voice communications, as it wouldn't capture the necessary audio frequencies needed for intelligibility. Similarly, a bandwidth of about 150 kHz or between 50 and 125 kHz is excessive for FM voice transmission and would typically be reserved for other uses, such as wideband data or specialized communications, rather than conventional voice communications on VHF repeaters.