irishREPUBLICANarmy's definitions

callsign

1) The identifying code letters or numbers of a radio or television transmitting station, assigned by a regulatory body. Also called call sign or call letters.

2) (military) code word for aircraft, ship, etc, used in radio communications.

Dark 87 this is Havoc 12, switch to 11175 and vector out to DZ.

by IRISHREPUBLICANARMY December 26, 2003

PSK31

A digital transmission mode -- Phase Shift keying with 31.25 baud rate

PSK31 is one of the better HF operating digital modes.

by IrishRepublicanArmy January 1, 2004

PRC-77

the PRC doesn't stand for anything.

the PRC-77 (and the improved PRC-770) are military VHF FM transcievers, that have been used sence 1960, and are slowly being phased out because the US Army likes them.

Frequency Coverage:
30.0000 to 76.0000 MHz
channel spacing:
50 kHz
channels:
920
Power Output:
5 watts
Range:
10 miles on a bad day
5 miles when the VC are shooting at you
30 miles when you get back to base

PRC-77s are used as manpack radios (straped to the back of GIs and used for unit-to-unit communications), if you've ever seen the movie "Platoon", the PRC-77 is the radio that all the Americans are carrying on thier backs.
or they are installed as radios in Humvees and tanks. (i.e. all the antennas on military viecles are connected to PRC-77s.

widly copied by every NATO member, so all the good guys can talk to each other.

"Roger, get the PRC-77 on 41.75 and call HQ"

by IrishRepublicanArmy October 21, 2003

St. Patrick's Day

for better definitions see Saint Patrick's Day

a day where everyone pretends to be irish

by IrishRepublicanArmy March 8, 2004

lightbulb

Electric lamp consisting of a glass bulb containing a wire filament (usually tungsten) that emits light when heated.

Geek One: What do you do in your free time?

Geek Two: Change lightbulbs!

by IrishRepublicanArmy January 27, 2004

NSA

see also Big Brother and 1984.

They listen to every radio transmission/telephone call/ etc. etc.

If it's got an antenna attached to it, the NSA is listening

by IrishRepublicanArmy November 13, 2003

blue chip

A high-quality, relatively low-risk investment; the term usually refers to stocks of large, well-established companies that have performed well over a long period.

I just put $500 on some good GE blue chip stock.

by IrishRepublicanArmy February 11, 2004