Field Day is the name of several different amateur radio contests. The rules of the contests vary, but most encourage the use of radio equipment outside of permanent buildings and using electricity other than conventional mains. Field Days have several purposes, differing in importance depending on the geographical area: Mrs. ...

• Emergency preparedness
• Recruitment of new radio amateurs
• Displaying ham radio to the general public

Unlike most other contests, Field Day is rarely a single-man operation. In fact, Field Day is frequently used to attract significant publicity to what ham radio is about. Some clubs will demonstrate a wide range of technologies, including single sideband voice, Morse code, and a number of digital modes including APRS, packet radio, as well as satellite communications. Publicity is one of the variables that comprise the promotional mix. ... 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. ... Morse code is a system of representing letters, numbers and punctuation marks by means of a code signal sent intermittently. ... Automatic Position Reporting System (APRS) is an amateur radio-based automatic position reporting system for tracking and digital communications, and was developed by Bob Bruninga, callsign WB4APR, at the United States Naval Academy. ... Packet radio is a form of digital data transmission used in amateur radio to construct wireless computer networks. ... A satellite is an object that orbits another object (known as its primary). ...

The most well-known Field Day is probably the ARRL Field Day, which is conducted by the ARRL the fourth full weekend every June. Other Field Days include IARU Region 1 Field Day. The American Radio Relay League (ARRL) was founded in May 1914 by Hiram Percy Maxim. ... June is the sixth month of the year in the Gregorian Calendar and one of four with the length of 30 days. ...

ARRL Field Day stresses emergency preparedness. Frequently, entire radio clubs get involved, and take "Field" Day literally, erecting numerous radio masts and towers, each bearing several antennas, in a field. Generators provide power to ham radio transceivers. Clubs (♣) is one of the four suits found in playing cards, marked with a black trefoil; the term is translated from the Spanish basto. ... Radio masts and towers are, typically, tall structures designed to support antennas for telecommunications and broadcasting, including television. ... A yagi antenna Most simply, an antenna is an electronic component designed to send or receive radio waves. ... ... A transceiver is a device that has a transmitter and receiver which is combined into a one unit. ...

The goal of ARRL Field Day is to work, or contact, as many stations as possible throughout the 24-hour duration of Field Day. The Field Day exchange is one's callsign, along with the number of stations in simultaneous operation, followed by a letter (A-F) designating the method in which the stations are being powered, such as by generator, solar power, or conventional mains AC. Electrical generator Generator (Mathematics) ... Solar power describes a number of methods of harnessing energy from the light of the sun. ... Type F Mains power plug & socket The term mains usually refers to the general purpose AC electrical power supply (as in Ive connected the appliance to the mains). The term is not usually used in the US and Canada. ... It has been suggested that this article or section be merged with AC power. ...