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
mugGet the Squad 51!mug.

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
mugGet the picket fencingmug.

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
mugGet the lightbulbmug.

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
mugGet the NSAmug.

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
mugGet the PRC-77mug.

squawk

Pilot slang for the transponder code being used to indentify the aircraft on radar. The code is made up of four digits, and all codes are used but 0000, try using that code in a civilian aircraft and watch how fast the air force lights your ass up. For normal flight the code is 1200, Hijack code is 7500, radio being jammed is 7600 and general mayday call is 7700. These are discrete codes from 7600 to 7677 and 7701 to 7785 also, but I cant tell you what they are for...
Jetblue 834 this is Dulles Control, squawk 4932 please and climb to 15000.

Roger dulles control, squawking.
by IrishRepublicanArmy October 13, 2003
mugGet the squawkmug.