Amateur radio frequency allocation is done by national telecommunications authorities. Globally, the ITU oversees how much radio spectrum is set aside for amateur radio transmissions. The International Telecommunication Union (ITU) is an international organization established to standardize and regulate international radio and telecommunications. ... Mrs. ...

Radio amateurs use a variety of transmission modes, including Morse code, radio teletype, data, and voice. Specific frequency allocations are a matter of record and vary from country to country and between ITU regions. 1922 Chart of the Morse Code Letters and Numerals Morse Code is a method for transmitting information, using standardized sequences of short and long marks or pulses -- commonly known as dots and dashes -- for the letters, numerals and special characters of a message. ... Radioteletype (RTTY) is a telecommunications system consisting of two teleprinters linked by a radio link. ...

Region 2

The frequency allocations for United States hams in ITU Region 2 are:

• Medium Frequency (MF) (300 kHz to 3 MHz)
  • 160 meters (1.8 - 2.0 MHz)
• High Frequency (HF) (3.0 - 30.0 MHz)
  • 80 meters (3.5 - 4.0 MHz)
  • 60 meters (five USB voice channels: 5.332, 5.348, 5.368, 5.373, 5.405 MHz)
  • 40 meters (7.0 - 7.3 MHz)
  • 30 meters (10.100 - 10.150 MHz)
  • 20 meters (14.000 - 14.350 MHz)
  • 17 meters (18.068 - 18.168 MHz)
  • 15 meters (21.000 - 21.450 MHz)
  • 12 meters (24.890 - 24.990 MHz)
  • 10 meters (28.0 - 29.7 MHz)
• Very High Frequency (VHF) (30 to 300 MHz)
  • 6 meters (50 - 54 MHz)
  • 2 meters (144 - 148 MHz)
  • 1.25 meters (219 - 220, 222 - 225 MHz)
• Ultra High Frequency (UHF) (300 MHz to 3 GHz)
  • 70 centimeters (420 - 450 MHz)
  • 33 centimeters (902 - 928 MHz)
  • 23 centimeters (1.24 - 1.3 GHz)
  • 13 centimeters (2.30 - 2.31 GHz and 2.39 - 2.45 GHz)
• Super High Frequency (SHF) (3 to 30 GHz)
  • 9 centimeters (3.3 - 3.5 GHz)
  • 5 centimeters (5.65 - 5.925 GHz)
  • 3 centimeters (10.0 - 10.5 GHz)
  • 1.2 centimeters (24.00 - 24.25 GHz)
• Extremely High Frequency (EHF) (30 to 300 GHz)
  • 6 millimeters (47.0 - 47.2 GHz)
  • 4 millimeters (75.5 - 81.0 GHz)
  • 2.5 millimeters (119.98 - 120.02 GHz)
  • 2 millimeters (142 - 149 GHz)
  • 1 millimeter (241 - 250 GHz)

The ARRL has a detailed band plan for US hams on their website. For ITU region 1, RSGB's band plan (PDF) will be more definitive. RAC has a chart showing the frequencies available to amateurs in Canada. The Wireless Institute of Australia has charts for Amateur frequencies for Australia. A kilohertz (kHz) is a unit of frequency equal to 1,000 hertz (1,000 cycles per second). ... MegaHertz (MHz) is the name given to one million (106) Hertz, a measure of frequency. ... At just above the AM Broadcast band, 160 meters is the lowest radio frequency band alloted for use by Amateur Radio operators. ... This article needs a complete rewrite for the reasons listed on the talk page. ... Shortwave bands are frequency allocations for use within the high frequency radio spectrum. ... Single-sideband modulation (SSB) is a refinement of the technique of amplitude modulation designed to be more efficient in its use of electrical power and bandwidth. ... This article needs a complete rewrite for the reasons listed on the talk page. ... This article needs a complete rewrite for the reasons listed on the talk page. ... This article needs a complete rewrite for the reasons listed on the talk page. ... Shortwave bands are frequency allocations for use within the high frequency radio spectrum. ... Shortwave bands are frequency allocations for use within the high frequency radio spectrum. ... Shortwave bands are frequency allocations for use within the high frequency radio spectrum. ... The 10 meter amateur radio band is the highest of the High Frequency or HF bands. ... // Summary 6 Meters is a popular ham radio band. ... 2 Meters is a popular amateur radio band. ... 1. ... A gigahertz is a billion hertz or a thousand megahertz, a measure of frequency. ... 70 Centimeters is a common ham radio band in the UHF spectrum. ... 33 Centimeters is an amateur radio band. ... The American Radio Relay League (ARRL) was founded in May 1914 by Hiram Percy Maxim. ... The Radio Society of Great Britain (RSGB) is the UKs recognised national society for radio amateurs. ... Radio Amateurs of Canada (RAC), known in French as Radio Amateurs du Canada, is a Canadian association of amateur radio operators. ...