IrishrepublicanArmy's definitions

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

Emergency Frequencies

Here are some common emergency frequencies:

(in MHz)


000.5000 International Distress (CW)
002.1820 International Distress
002.6700 Calling to US Coast Guard
004.1250 Calling/Distress
006.2155 Calling/Distress
008.2570 Calling/Distress
012.3820 Calling/Distress
016.5220 Calling/Distress
027.0650 CB channel 9, emergency
034.9000 Military Low Band Calling
121.5000 International Distress
156.8000 International Distress
243.0000 International Distress

Monitor 2.182 MHz!

by IrishRepublicanArmy December 21, 2003

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

Type 3 Algorithm

Cryptographic algorithm that has been registered by the National Institute of Standards and Technology and has been published as a Federal Information Processing Standard for use in protecting unclassified sensitive information or commercial information. NTIA

The US Government uses the type 3.

by IrishRepublicanArmy June 11, 2006

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

alpha

the letter 'A' in the international radio phonetic alphabet

also used in military radio slang for comanding officer or radio station

Tango six one this is alpha

by IrishRepublicanArmy October 13, 2003

DX

Radio term for "extended distance".
What "extended distance" really is could be 100 miles, 1000 miles, 10,000 miles, it is pretty grey as to an exact number or distance.

11-meter pirate radio operators use the frequency of 27.555 MHz (27555.0 kHz) for DX calling.

by IrishRepublicanArmy December 23, 2003