HF Communications

Amateur radio operators, also known as hams, have access to several frequency bands for high-frequency (HF) communication. These bands are allocated by the International Telecommunication Union (ITU) for amateur radio use. The HF bands are particularly useful for long-distance communication, especially during periods of favorable atmospheric conditions that allow for “skip” propagation. Here are the HF bands commonly used by amateur radio operators:

160 Meters (1.8 – 2.0 MHz):

This band is known as the “Top Band.” It is primarily used for local and regional communications, especially at night.

80 Meters (3.5 – 4.0 MHz):

This band is popular for regional communication, especially during the evening and nighttime hours. It supports both voice and digital modes.

40 Meters (7.0 – 7.3 MHz):

This band is popular for both short and long-distance communication during both day and night. It is widely used for voice and digital modes.

30 Meters (10.1 – 10.15 MHz):

This band is unique to amateur radio and is used for digital and CW (Continuous Wave) communication. It is popular for its good daytime and nighttime propagation.

20 Meters (14.0 – 14.35 MHz):

This is one of the most widely used HF bands for long-distance communication. It is popular for voice, CW, and digital modes.

17 Meters (18.068 – 18.168 MHz):

This band is used for both regional and long-distance communication. It is particularly popular for CW and digital modes.

15 Meters (21.0 – 21.45 MHz):

This band is known for good daytime propagation and is used for voice, CW, and digital modes.

12 Meters (24.89 – 24.99 MHz):

This band is less commonly used but offers good propagation during daylight hours. It is used for voice, CW, and digital modes.

10 Meters (28.0 – 29.7 MHz):

This band supports both local and long-distance communication, and it is popular for voice, CW, and digital modes. It is also known for sporadic E-skip propagation.

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Amateur radio operators must be aware of and adhere to the frequency allocations and regulations established by their respective national regulatory authorities. Additionally, propagation conditions on HF bands can vary based on factors such as time of day, solar activity, and seasonal changes.