write 10 HARD WORDS from Ham radio
Answers
Answer:
Alternator ? A device use to produce alternating current (ac).
Alternating Current (ac)? Electrical current that flows first in one direction in a wire and then in the other. The applied voltage is also changing polarity. This direction reversal continues at a rate that depends on the frequency of the ac.
Amateur Satellite? A spacecraft dedicated to reception and retransmission of amateur radio signals.
Amateur Television (ATV)? Transmitting visual images over the airwaves. Introduction to Slow Scan Television.
Ampere (A)? The basic unit of electrical current. It is measured in amperes.
Amplitude Modulation (AM)? A method of combining an information signal (modulation) and an RF carrier. Shortwave broadcast stations use this type of modulation, as do stations in the Standard Broadcast Band (535-1705 kHz) AM usually consists of a carrier frequency and 2 sidebands, upper and lower....see Introduction to SSB here.
AMSAT? The Radio Amateur Satellite Corporation, non-for-profit corporation dedicated to the advancement of Amateur Radio satellites.
Antenna Switch? A switch used to connect one transmitter, receiver or transceiver to several different antennas. A two position antenna switch would connect two different antennas.
Antenna Tuner? A device that matches the antenna system input impedance to the transmitter, receiver or transceiver output impedance. Also called an antenna-matching network, impedance-matching network or Transmatch. Sometimes called an ATU. How to use an antenna tuner.
ARES? Amateur Radio Emergency Service: sponsored by ARRL, and presents a way for local amateurs to provide emergency communications while working with the Red Cross and Emergency Operations Centers.
ARRL - The national association of amateur radio operators. ARRL home page.
Autopatch? a device that allows repeater users to make telephone calls through a repeater.
Band-Pass Filter? A circuit that allows signals to go through it only if they are within a certain range of frequencies. It attenuates signals above and below this range.
Band Plan? Agreements between operators about how to use the band/s, rather than FCC regulations. Portions of each ham band are dedicated to certain modes of operation. See ARRL Band Plan here.
Beacon Station? An amateur station transmitting communications for the purposes of observation of propagation and reception or other related experimental activities.
Block Diagram? A drawing using boxes to represent sections of a complicated device or process.
Capacitor ? An electrical component usually formed by separating two conductive plates with an insulating material. A capacitor stores energy in an electric filed. Old terminology, use the word condenser.
Centi ? The metric prefix for 10(-2), or divided by 100.
Closed, or Complete Circuit ? An electrical circuit with an uninterrupted path for the current to follow. Turning a switch on, for example, closes or completes the circuit, allowing current to flow.
Closed Repeater? A repeater that is restricted in use to only those authorized by a club or group.
Conductor? A material that has a loose grip on its electrons, so an electrical current can pass through it. Wire is a condcuctor of electricity.
Controlled Environment? Any area in which an RF signal may cause radiation exposure to people who are aware of the radiated electric and magnetic fields and who can exercise some control over their exposure to these fields. The FCC generally considers amateur operators to be in a controlled RF exposure environment to determine the maximum permissible exposure levels.
Control Operator? Am amateur operator designated by the licensee of a station to be responsible for the transmissions of an amateur station. Many control operators are sometimes used in large repeater systems. You are the control operator of your licensed call sign.
CQ?"Calling any station" - the general call when requesting a conversation with anyone.
Crystal-Controlled Transmitter ? A simple type of transmitter that consists of a crystal oscillator followed by driver and power amplifier stages.
Crystal Oscillator? A circuit that uses a quartz crystal to keep the frequency of a transmitter constant or within certain limits as related to it's frequency.
CTCSS ? Continuous tone-coded squelch system, used to limit repeater interference. Also called PL tones, taken from Motorola "Private Line" system terminology.
Current? A flow of electrons in an electrical circuit. Measured in Amps or parts of an amp.
CW ? (Morse code) ? A communications mode transmitted by on/off keying of a radio-frequency signal.