T---- ( Tera (prefix for 10*12); Transformer. )

TA---- ( Technical Advisor. )

Tactical Call Signs---- ( Names used to identify a location or function during a local emergency communications. )

TAPR---- ( Tucson Amateur Packet Radio Corporation, a nonprofit organization involved in packet-radio development. )

TC---- ( Technical Coordinator. )

TCC---- ( Transcontinental Corps (NTS). )

TCP/IP---- ( Transmission Control Protocol/Internet Protocol. )

TCXO---- ( Temperature Compensated Crystal Oscillator--Heated crystal oscillator for better frequency stability. )

TD---- ( Technical Department (ARRL HQ). )

Technical Information Service---- ( A service of the American Radio Relay League that helps hams solve technical problems. )

Technical License---- ( One of two entry-level classes of Amateur Radio licenses. Those who hold this license can use all the amateur bands above 30 MHz. In addition, Technicians who have passed a 5-word-per-minute Morse code test can use the four HF Novice bands. )

Telecommand---- ( A one-way transmission to initiate, modify, or terminate functions of a device at a distance. )

Telecommand Station---- ( An amateur station that transmits communications to initiate, modify, or terminate functions of a space station. )

Telemetry---- ( Radio signals, originating at a satellite, that convey information on the performance or status of onboard subsystems. Also refers to the information itself. )

Telemetry---- ( A one-way transmission of measurements at a distance from the measuring instrument. )

Teleport---- ( A radio station that acts as a relay between terrestrial radio stations and a communications satellite. )

Teleprinter---- ( A machine that can convert keystrokes (typing) into electrical impulses. The teleprinter can also convert the proper electrical impulses back into text. Computers have largely replaced teleprinters for amateur radioteletype work. )

Television Interference (TVI)---- ( Interruption of television reception caused by another signal. )

Temperature Inversion---- ( A condition in the atmosphere in which a region of cool air is trapped beneath warmer air. )

Temporary State Of Communications Emergency---- ( When disaster disrupts normal communications in a particular area, the FCC can declare this type of emergency. Certain rules may apply for the duration of the emergency. )

Ten code---- ( Abbreviated method of conversation originated by police.
(The APCO Bulletin, January 1940. The first official publication showing the 10-codes) )

Terminal---- ( An inexpensive piece of equipment that can be used in place of a computer in a packet radio station. )

Test---- ( Emissions containing no information having the designators with N as the third symbol. Test does not include pulse emissions with no information or modulation unless the pulse emissions are also authorized in the frequency bandTR---- ( Transmit/receive. )

. )

Tetrode ---- ( A four-element vacuum tube with a cathode, a control grid, a screen grid, and a plate. )

The Band is Open---- ( Means there are good conditions for Skip. )

Thermocouple---- ( A device made up of two different metals joined at two places. If one joint is hot and the other cold a voltage may be developed, which is a measure of the temperature difference. )

Thin---- ( A very weak signal. )

Third-party Communications---- ( Messages passed from one amateur to another on behalf of a third person. )

Third-party Communications Agreement---- ( An official understanding between the United States and another country that allows amateurs in both countries to participate in third-party communications. )

Third-party Participation---- ( The way an unlicensed person can participate in amateur communications. A control operator must ensure compliance with FCC rules. )

Ticket---- ( A common name for an Amateur Radio license. )

Time Constant ---- ( The time required for the voltage in an RC circuit or the current in an RC circuit to rise from zero to approximately 63.2% of its maximum value or fall from its maximum value 63.2% toward zero. )

Time Domain---- ( A measurement technique where the results are plotted or shown against a scale of time. Incontrast to frequency domain, where the results are plotted against a scale of frequency. )

Time-out---- ( To cause the repeater or a repeater function to turn off because you have transmitted for too long. )

Timer---- ( A device that measures the length of each transmission and causes the repeater or a repeater function to turn off after a transmission has exceeded a certain length. )

TNC---- ( Terminal Node Controller--Modem for data communication (packet-radio); Software or hardware that processes packets; A device that assembles and disassembles packets (frames); Sometimes called a PAD. or A type of antenna. )

Tone Pad---- ( An array of 12 or 16 numbered keys that generate the standard telephone dual-tone multifrequency (DTMF) dialing signals. Resembles a standard telephone keypad. )

Toroid ---- ( Literally, any donut-shaped solid; Most commonly referring to ferrite or powdered-iron cores supporting inductors and transformers. )

Traffic---- ( A message or messages sent by radio. )

TR---- ( Transmit/receive. )

Transceiver---- ( Combination of Transmitter and Receiver in one unit. )

Transducer ---- ( Any device that converts one form of energy to another; For example an antenna, which converts electrical energy to electromagnetic energy or a speaker, which convertts electrical energy to sonic energy. )

Transformer ---- ( A device consisting of at least two coupled inductors capable of transferring energy through mutual inductance. )

Transient---- ( A short perturbation on a power line, usually lasting for microseconds to tens of milliseconds. )

Transistor---- ( A solid-state device made of three layers of semiconductor material. )

Transmission Line---- ( The wires or cable used to connect a transmitter or receiver to an antenna. Also called "feed line". )

Transmitter ---- ( A device that produces radio-frequency signals. )

Transponder---- ( A device onboard a satellite that received radio signals in one segment of the spectrum, amplifies them, translates (shifts) their frequency to another segment of the spectrum and retransmits them. Also called linear translator. )

Triode---- ( A three element vacuum tube with a cathode, a grid, and a plate. )

Troposphere---- ( The region in Earth's atmosphere just above the Earth's surface and below the ionosphere. )

Tropospheric Bending---- ( When radio waves are bent in the troposphere, they return to Earth farther away than the visible horizon. )

Tropospheric Ducting---- ( A type of VHF propagation that can occur when warm air overruns cold air (a temperature inversion). )

T-R Switch---- ( Transmit Receive switch found on older radios. )

TR Switch---- ( Transmit/Receive--A mechanical switch relay or electronic circuit used to switch an antenna between a receiver and transmitter. )

TS---- ( Tuning Step; Technical Specialist. )

TSQL---- ( Tone Squelch. )

TTL---- ( Transistor-transistor logic; A logic IC family commonly used with a 5 V supplies. )

TTY---- ( Teletypewriter. )

TU---- ( Terminal Unit; A radioteletype modem or demodulator. )

Tuned up---- ( CB set tuned for maximum output. )

Turnaround Time---- ( The time required to reverse the direction of a half-duplex circuit, required by propagation, modem reversal and transmit-receive switching time of transceiver. )

TV---- ( Television. )

TVI---- ( Television interference. )

TX---- ( Transmitter, transmitting. )

T.X.---- ( Transmit or telephone. )

TxD---- ( Transmitted data, physical-level data signals transfrred on a circuit from the DTE to the DCE. )

Type Acceptance---- ( An equipment authorization granted by the FCC. It is used to ensure that equipment will function properly in the service for which it has been accepted. Amateur equipment does not require type acceptance although HF power amplifiers and amplifier kits do. )

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Lycos Small Business

The Copyright Minefield By Jacqui Kramer, Contributing Author
10/5/2000 9:19:53 AM PDT

"The copyright issue is a sticky one for Web site owners and their employees, particularly contractors.
Currently in the United States, there are no laws that specifically address copyright issues in the online world.
However, the U.S. courts have ruled that existing copyright laws governing the print world can be applied to the online world."

If by mistake, I've used someone's copyright material, notify me, and I'll remove it.

All Trademarks are Recognised as belonging to Their Respective Owners