The sideband decrease in frequency than the transmitters provider. A reception te**ique the place the service produced by a receivers BFO circuit or product detector is used to excha**he provider of an AM signal for higher reception. DXpedition: An **anized effort by ham radio operators to place a un**on location on the air, or a trip by shortwave listeners to a site for favorable DX reception. A receiver circuit **sisting of a beat frequency oscillator and extra circuitry for enhanced reception of SSB indicators. Yagi: A directional antenna **sisting of a dipole linked to the receiver or transmitter and two additional elements, a barely longer reflector and a slightly shorter director. A directional antenna **sisting 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 certain point but which allows all decrease frequencies to pass.

A filter that rejects all frequencies under a certain point but which allows all larger frequencies to pass. An antenna suitable for operation on only one band of frequencies. Radio alerts from 300 to 3000 kHz, although this term is usually used to mean any radio signal in the AM broadcast band (540 to 1700 kHz). Radio alerts 300 kHz and decrease in frequency, although this term is **only used to imply any radio signal lower than 540 kHz. GMT: Abbreviation f**reenwich mean time. SWR: Abbreviat**r standing wave ratio. The ratio between two power ranges on a logarithmic scale. A excessive pitched "whistle" sound caused by two carriers interfering with each other. The pitch of the "whistle" is determined by the frequency distinction between the carriers. A device that receives multiple signals inside a certain frequency vary and simultaneously retransmits them in one other frequency vary. A frequency that is an integer multiple (two times, three times, and many others.) of a lower frequency. LUF: Abbreviat**r lowest usable frequency, the bottom frequency that may support propagation between two points. MW: Abbreviat**r megawatt. IRC: Abbreviat**r International Reply Coupon. FSK: Abbreviat**r frequency shift keying.

UHF low: The frequency vary from 450 to 470 MHz. A tuning te**ique in transmitters and receivers which uses a couple of piezoelectric crystals to generate a variety of frequencies. A term used to explain receivers and transmitters masking no less than the frequency vary of 500 kHz to 30 MHz and capable of operation in several different modes, including AM, CW, and SSB. DXCC: Abbreviat**r "DX **tury Club," an award given by the ARRL to hams who **tact different hams in no less than one hundred **pletely different countries. FEC: Abbreviat**r forward error correction, a FSK mode that transmits every character twice to keep away from errors. A mode that shifts the stations provider between two fixed frequencies to kind characters. An antenna appropriate for operation on several totally different bands of frequencies. F**reatest efficiency, the impedance of an antenna, the feedline, and the antenna co**or on a radio should be approximately equal. An antenna that radiates, or receives fi**, radio waves having their electric area parallel to the Earths floor. The opposition to the movement of electric present and radio energy; it's measured in ohms (W).

RST: A code utilized by ham radio operators to indicate a stations readability, signal power, 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 direction of maximum radiation or received signal energy for a directional antenna. S-meter: A meter or bargraph that signifies the relative strength of a obtained sign. The obvious improve in the power of a sign radiated or received by an antenna brought on by the antenna having higher efficiency in some directions than others. An antenna that transmits and receives equally properly in all directions. The frequency at which an antenna radiates or receives with most efficiency. MUF: Abbreviat**r max usable frequency, the very best frequency that ** assist propagation between two points. Hz: Abbreviat**r 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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