Most VHF mobile radios operate between what range?

Most VHF mobile radios operate between what range?

• A. 3-30 MHz
• B. 30-300 MHz
• C. 300-3000 MHz
• D. 3000-30,000 MHz

Answer: (B)

VHF is the band from about 30 to 300 MHz. Radios designed for mobile use operate within this range because the wavelengths (about 10 to 1 meter) allow practical, vehicle-friendly antennas and reliable line-of-sight communication over local distances. The other ranges correspond to different bands: 3–30 MHz is HF, used for long-distance ionospheric propagation; 300–3000 MHz is UHF, which is still line-of-sight but at higher frequencies; and 3000–30,000 MHz is microwave/shf, used for radar and satellite links. So most VHF mobile radios indeed operate in the 30–300 MHz range.

VHF is the band from about 30 to 300 MHz. Radios designed for mobile use operate within this range because the wavelengths (about 10 to 1 meter) allow practical, vehicle-friendly antennas and reliable line-of-sight communication over local distances. The other ranges correspond to different bands: 3–30 MHz is HF, used for long-distance ionospheric propagation; 300–3000 MHz is UHF, which is still line-of-sight but at higher frequencies; and 3000–30,000 MHz is microwave/shf, used for radar and satellite links. So most VHF mobile radios indeed operate in the 30–300 MHz range.