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The sideband lower in frequency than the transmitters service. A reception technique where the service produced by a receivers BFO circuit or product detector is used to replace the service of an AM sign for better reception. DXpedition: An organized effort by ham radio operators to put a uncommon location on the air, or a visit by shortwave listeners to a site for favorable DX reception. A receiver circuit consisting of a beat frequency oscillator and extra circuitry for enhanced reception of SSB signals. Yagi: A directional antenna consisting of a dipole linked to the receiver or transmitter and two additional components, a barely longer reflector and a barely shorter director. A directional antenna consisting of two one-wavelength "squares" of wire placed a quarter-wavelength apart. In FSK, the higher of the 2 frequencies used. A filter that rejects all frequencies above a sure level but which allows all lower frequencies to move.

A filter that rejects all frequencies under a certain point however which allows all higher frequencies to go. An antenna appropriate for operation on just one band of frequencies. Radio alerts from 300 to 3000 kHz, although this term is commonly used to imply any radio sign within the AM broadcast band (540 to 1700 kHz). Radio signals 300 kHz and lower in frequency, though this time period is often used to imply any radio signal lower than 540 kHz. GMT: Abbreviation for Greenwich mean time. SWR: Abbreviation for standing wave ratio. The ratio between two power levels on a logarithmic scale. A high pitched "whistle" sound attributable to two carriers interfering with one another. The pitch of the "whistle" will depend on the frequency difference between the carriers. A system that receives a number of alerts within a certain frequency vary and simultaneously retransmits them in another frequency vary. A frequency that is an integer multiple (two instances, three times, and many others.) of a lower frequency. LUF: Abbreviation for lowest usable frequency, the bottom frequency that may support propagation between two factors. MW: Abbreviation for megawatt. IRC: Abbreviation for International Reply Coupon. FSK: Abbreviation for frequency shift keying.

UHF low: The frequency vary from 450 to 470 MHz. A tuning methodology in transmitters and receivers which makes use of a few piezoelectric crystals to generate a wide range of frequencies. A term used to explain receivers and transmitters protecting no less than the frequency range of 500 kHz to 30 MHz and able to operation in a number of different modes, including AM, CW, and SSB. DXCC: Abbreviation for "DX Century Club," an award given by the ARRL to hams who contact other hams in at least one hundred totally different countries. FEC: Abbreviation for ahead error correction, a FSK mode that transmits each character twice to keep away from errors. A mode that shifts the stations carrier between two mounted frequencies to form characters. An antenna appropriate for operation on several completely different bands of frequencies. For best performance, the impedance of an antenna, the feedline, and the antenna connector on a radio should be roughly equal. An antenna that radiates, or receives finest, radio waves having their electric field parallel to the Earths surface. The opposition to the flow of electric current and radio energy; it's measured in ohms (W).

RST: A code utilized by ham radio operators to point a stations readability, sign strength, and tone of its Morse code signals. Slang for a face-to-face meeting between two ham radio operators or radio hobbyists. Slang for the utmost transmitter energy authorized for ham radio operators. The path of maximum radiation or acquired signal strength for a directional antenna. S-meter: A meter or bargraph that indicates the relative strength of a obtained sign. The obvious increase in the power of a signal radiated or acquired by an antenna attributable to the antenna having higher efficiency in some instructions than others. An antenna that transmits and receives equally nicely in all directions. The frequency at which an antenna radiates or receives with most effectivity. MUF: Abbreviation for max usable frequency, the very best frequency that can help propagation between two factors. Hz: Abbreviation for kilohertz. Unit equal to 1,000,000 hertz or a thousand kilohertz. Unit equal to one thousand hertz. Unit equal to 1,000,000 watts of transmitter power.

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