The sideband decrease in frequency than the transmitters carrier. A reception technique where the service produced by a receivers BFO circuit or product detector is used to replace the provider of an AM signal for higher reception. DXpedition: An organized effort by ham radio operators to put a rare 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 extra circuitry for enhanced reception of SSB alerts. Yagi: A directional antenna consisting of a dipole linked to the receiver or transmitter and two additional components, a slightly longer reflector and a barely shorter director. A directional antenna consisting of two one-wavelength "squares" of wire positioned a quarter-wavelength apart. In FSK, the upper of the 2 frequencies used. A filter that rejects all frequencies above a sure point however which permits all decrease frequencies to go.

A filter that rejects all frequencies under a certain level but which allows all greater frequencies to cross. An antenna appropriate for operation on only one band of frequencies. Radio signals from 300 to 3000 kHz, although this time period is usually used to mean any radio sign within the AM broadcast band (540 to 1700 kHz). Radio indicators 300 kHz and decrease in frequency, though this time period is often used to mean any radio signal decrease than 540 kHz. GMT: Abbreviation for Greenwich imply 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 each other. The pitch of the "whistle" depends on the frequency difference between the carriers. A device that receives a number of indicators inside a certain frequency vary and simultaneously retransmits them in one other frequency vary. A frequency that is an integer multiple (two times, 3 times, and so forth.) of a decrease frequency. LUF: Abbreviation for lowest usable frequency, the lowest frequency that may assist 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 methodology in transmitters and receivers which makes use of a number of piezoelectric crystals to generate a variety of frequencies. A term used to describe receivers and transmitters masking at the least the frequency range of 500 kHz to 30 MHz and able to operation in several totally different modes, together with AM, CW, and SSB. DXCC: Abbreviation for "DX Century Club," an award given by the ARRL to hams who contact other hams in at the very least a hundred totally different international locations. FEC: Abbreviation for ahead error correction, a FSK mode that transmits every character twice to keep away from errors. A mode that shifts the stations service between two fastened frequencies to form characters. An antenna suitable for operation on several different bands of frequencies. For best performance, the impedance of an antenna, the feedline, and the antenna connector on a radio must be approximately equal. An antenna that radiates, or receives finest, radio waves having their electric field parallel to the Earths floor. The opposition to the stream of electric current and radio power; it is measured in ohms (W).

RST: A code used by ham radio operators to indicate a stations readability, signal energy, 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 course of most radiation or obtained sign energy for a directional antenna. S-meter: A meter or bargraph that signifies the relative power of a received sign. The apparent enhance within the strength of a signal radiated or obtained by an antenna brought on by the antenna having higher performance 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 maximum usable frequency, the highest frequency that may support propagation between two factors. Hz: Abbreviation for kilohertz. Unit equal to 1,000,000 hertz or one thousand kilohertz. Unit equal to one thousand hertz. Unit equal to 1,000,000 watts of transmitter energy.

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