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The sideband decrease in frequency than the transmitters provider. A reception approach where the provider produced by a receivers BFO circuit or product detector is used to substitute the service of an AM signal for higher reception. DXpedition: An organized effort by ham radio operators to place a uncommon location on the air, or a trip by shortwave listeners to a site for favorable DX reception. A receiver circuit consisting of a beat frequency oscillator and additional circuitry for enhanced reception of SSB alerts. Yagi: A directional antenna consisting of a dipole connected to the receiver or transmitter and two extra parts, a slightly longer reflector and a slightly shorter director. A directional antenna consisting of two one-wavelength "squares" of wire positioned a quarter-wavelength apart. In FSK, the upper of the two frequencies used. A filter that rejects all frequencies above a sure point but which allows all lower frequencies to move.

A filter that rejects all frequencies under a sure level however which permits all larger frequencies to pass. An antenna suitable for operation on just one band of frequencies. Radio signals from 300 to 3000 kHz, although this time period is commonly used to mean any radio signal within the AM broadcast band (540 to 1700 kHz). Radio alerts 300 kHz and lower in frequency, although this term is usually used to mean any radio signal lower than 540 kHz. GMT: Abbreviation for Greenwich imply time. SWR: Abbreviation for standing wave ratio. The ratio between two energy levels on a logarithmic scale. A excessive pitched "whistle" sound attributable to two carriers interfering with each other. The pitch of the "whistle" is determined by the frequency difference between the carriers. A device that receives a number of signals within a certain frequency vary and concurrently retransmits them in another frequency vary. A frequency that is an integer multiple (two instances, three times, etc.) of a decrease frequency. LUF: Abbreviation for lowest usable frequency, the lowest frequency that can help propagation between two factors. MW: Abbreviation for megawatt. IRC: Abbreviation for International Reply Coupon. FSK: Abbreviation for frequency shift keying.

UHF low: The frequency range from 450 to 470 MHz. A tuning technique in transmitters and receivers which uses a number of piezoelectric crystals to generate a wide range of frequencies. A time period used to explain receivers and transmitters protecting a minimum of the frequency range of 500 kHz to 30 MHz and able to operation in several completely different modes, including AM, CW, and SSB. DXCC: Abbreviation for "DX Century Club," an award given by the ARRL to hams who contact different hams in a minimum of one hundred completely different international locations. FEC: Abbreviation for ahead error correction, a FSK mode that transmits each character twice to avoid errors. A mode that shifts the stations service between two fastened frequencies to type characters. An antenna suitable for operation on a number of totally different bands of frequencies. For finest efficiency, the impedance of an antenna, the feedline, and the antenna connector on a radio must be approximately equal. An antenna that radiates, or receives greatest, radio waves having their electric area parallel to the Earths surface. The opposition to the flow of electric present and radio energy; it is measured in ohms (W).

RST: A code used by ham radio operators to indicate a stations readability, signal strength, and tone of its Morse code indicators. Slang for a face-to-face assembly between two ham radio operators or radio hobbyists. Slang for the maximum transmitter energy authorized for ham radio operators. The course of most radiation or acquired sign strength for a directional antenna. S-meter: A meter or bargraph that signifies the relative power of a received sign. The obvious improve within the energy of a signal radiated or acquired by an antenna attributable to the antenna having better efficiency in some instructions than others. An antenna that transmits and receives equally well in all instructions. The frequency at which an antenna radiates or receives with maximum efficiency. MUF: Abbreviation for optimum usable frequency, the best frequency that may help propagation between two factors. Hz: Abbreviation for kilohertz. Unit equal to 1,000,000 hertz or a thousand kilohertz. Unit equal to a thousand hertz. Unit equal to 1,000,000 watts of transmitter power.

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