IrishrepublicanArmy's definitions

F region

That portion of the ionosphere existing between approximately 160 and 400 km above the surface of the Earth, consisting of layers of increased free-electron density caused by the ionizing effect of solar radiation. Note 1: The F region reflects normal-incident frequencies at or below the critical frequency (approximately 10 MHz) and partially absorbs waves of higher frequency. Note 2: The F1 layer exists from about 160 to 250 km above the surface of the Earth and only during daylight hours. Though fairly regular in its characteristics, it is not observable everywhere or on all days. The principal reflecting layer during the summer for paths of 2,000 to 3,500 km is the F1 layer. The F1 layer has approxi­mately 5 ´ 105 e/cm3 (free electrons per cubic centi­meter) at noontime and minimum sunspot activity, and increases to roughly 2 ´ 106 e/cm3 during maxi­mum sunspot activity. The density falls off to below 104 e/cm3 at night. Note 3: The F1 layer merges into the F2 layer at night. Note 4: The F2 layer exists from about 250 to 400 km above the surface of the Earth. The F2 layer is the principal reflecting layer for HF communications during both day and night. The horizon-limited distance for one-hop F2 propagation is usually around 4,000 km. The F2 layer has about 106 e/cm3. However, variations are usually large, ir­reg­ular, and particularly pronounced during magnetic storms.

good thing there are like 10 people in the world who know what that means

by IRISHrepublicanARMY January 3, 2004

DX-949

The DX-949 is an AM/SSB CB radio.
It covers 26.965 to 27.405 but can easliy be moded to cover from 26 to 28 MHz, making it a nice freeband radio.

use 27.555 MHz for calling in USB mode.

by IrishRepublicanArmy December 20, 2003

grikah

bunch 'o hot freshman (this is 2004) that go to Fairfax High School.

Man check out the grikah girl over there

whoa

by IrishRepublicanArmy January 25, 2004

World War Three

For a completely inchorent definition see The Third World War

456.6625 MHz

by IrishRepublicanArmy January 21, 2004

Agent Orange

orginally classified as a "defoliant" but the US Government found out that it is better at killing VC soliders and giving Americans prostate cancer.

Between 1965 and 1970, the United States dropped more then 50,000 tons of Agent Orange on Vietnam.

by IrishRepublicanArmy March 3, 2004

oscilloscope

A test instrument that shows a picture of electrical waveforms by means of a cathode ray tube. An oscilloscope is calibrated so one can measure the instantaneous values and waveforms of electrical signals that are changing rapidly or varying as a function of voltage or time. Also known as a Scope.

I use my oscilloscope to measure the waveforms of my 27 MHz band jamming transmitter.

by IrishRepublicanArmy January 2, 2004

radio

1) A form of wireless communications in which the output of the transmitter takes the form of dissipating electromagnetic radiation which spreads outward from the antenna through free space. The signal strength drops off as the square of the distance from the source of radiation. Distant radio receivers have to be very sensitive to detect signals that can measure only a few microvolts per meter in strength.

2) A communications device allowing the wireless transmission through space of audible signals encoded in electromagnetic waves in the approximate frequency range from 10 kilohertz to 300,000 megahertz.

3) (maratime definition) An instrument that uses electromagnetic waves to communicate with other vessels. VHF radios are common for marine use, but are limited in range. HF-SSB (single sideband) radios have longer ranges.

4) an electronic receiver that detects and demodulates and amplifies transmitted signals

5) Radio is a system for the distribution of advertisement, chiefly brand advertisement for package-goods, and advertisement for recorded music sold by BigCos. To describe radio as a system for the diffusion of news, or of music, or as a technology, would be not only inaccurate but actually misleading. Radio is a creature of the advertising business, as its child, TV. television

6) Transmit messages via radio waves, usally on a set wavelength, or frequency.

There are many differant types of radio-frequency modulation, these include AM and FM.

by IrishRepublicanArmy December 31, 2003