Amateurradio, also known as ham radio, is the use of the radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation...
authorized bands may vary by the class of the station license. Radioamateurs use a variety of transmission modes, including Morse code, radioteletype,...
An amateurradio satellite is an artificial satellite built and used by amateurradio operators. It forms part of the Amateur-satellite service. These...
emission mode as permitted. The WPC has authorized the following emission modes: Two categories ofamateurradio licence exist. The Amateur Wireless Telegraph...
An amateurradio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation ofradio signals. Most radio propagation beacons...
Amateurradio or ham radio is practised by more than 22,000 licensed users in India. The first amateurradio operator was licensed in 1921, and by the...
An amateurradio repeater is an electronic device that receives a weak or low-level amateurradio signal and retransmits it at a higher level or higher...
Amateurradio call signs are allocated to amateurradio operators around the world. The call signs are used to legally identify the station or operator...
Tobago AmateurRadio Society, Inc. (TTARS) is the national amateurradio organization in the Republic of Trinidad and Tobago. It is a member society of the...
faster modes such as 8-PSK. Using this software, it is possible for amateurradio operators to communicate worldwide while using only a few watts of RF power...
PACTOR is a radio modulation mode used by amateurradio operators, marine radio stations, military or government users such as the US Department of Homeland...
communication and later adopted by other radio services, especially amateurradio. To distinguish the use of a Q-code transmitted as a question from the...
The American Radio Relay League (ARRL) is the largest membership association ofamateurradio enthusiasts in the United States. ARRL is a non-profit organization...
introduced many amateurs to QRP'ing and led to the popularity of the mode. Enthusiasts operate QRP radios on the HF bands in portable modes, usually carrying...
the United States, amateurradio licensing is governed by the Federal Communications Commission (FCC). Licenses to operate amateur stations for personal...
AmateurRadio Union (IARU) is an international confederation of national organisations that allows a forum for common matters of concern to amateur radio...
these cables soon ended the economic viability of shortwave radio for commercial communication. Amateurradio operators also discovered that long-distance...
service allocations such as FRS, GMRS, MURS, UHF CB and the AmateurRadio Service ("ham" radio). In many countries, CB operation does not require a license...
rate for Amateur operation of 45.45 baud (approximately 60 words per minute). It remains popular as a "keyboard to keyboard" mode in AmateurRadio. RTTY...
linear transponders offering the CW, SSB and FM modesofamateurradio communication. They operate Mode-B for U-V operation with UHF uplink and VHF downlink...