Very high frequency (VHF): Frequencies of 30 MHz to 300 MHz, hence wavelengths of 1m to 10m . High frequency (HF): Frequencies of 3 MHz to 30 MHz, hence wavelengths of 10m to 100 m. Medium frequency (MF): Frequencies of 300 kHz to 3 MHz, hence wavelengths of 100m to 1 km.
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