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

St. Patrick's Day

for better definitions see Saint Patrick's Day

a day where everyone pretends to be irish

by IrishRepublicanArmy March 08, 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

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 01, 2004

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

Squad 51!

An exclamation, from the 70s show Emergency.

It comes from the fire department dispatch guy that goes "Squad 51!"

"(random DTMF tones) Squad 51! (insert random dramatic event here)

"roger, squad 51, KMG365"

by IrishRepublicanArmy November 28, 2003

picket fencing

(Repeater Term) A condition experienced on VHF and above where a signal rapidly fluctuates in amplitude causing a sound akin to rubbing a stick on a picket fence. If a repeater user's signal isn't strong enough to maintain solid access to the machine's input (such as when operating from a vehicle passing beneath underpasses or through hilly terrain), the signal would be hard to copy because of a pronounced, rapid fluttery or choppy characteristic.

We can't copy you, you're picket fencing really badly.

by IrishRepublicanArmy January 01, 2004