CONELRAD was a method of emergency broadcasting to the public of the United States in the event of enemy attack during the Cold War. It was intended to allow continuous broadcast of civil defense info
"CD Mark" symbols (usually simple white or red triangles) at CONELRAD's 640 and 1240 kHz frequencies were on the dials of most radios sold in the US between 1953 and 1963.
Cold War-era CONELRAD poster.
Car radio with CONELRAD frequencies marked with small red marks
First commercial transistor radio Regency TR-1 with small red dial markings
Civil defense in the United States refers to the use of civil defense in the history of the United States, which is the organized non-military effort to prepare Americans for military attack and simil
CONELRAD
…CONELRAD CONELRAD Logo, incorporating the shield of United States Civil Defense Type Emergency warning system Country United States Broadcast area Nationwide Ownership Owner Federal Civil Defense Administration History Launch date…
Handbooks, guides, and bulletins showing the variety of opportunities for civilian defense volunteers during WWII
This 1950 atomic bomb information card, meant for US military personnel, describes how in a number of respects an "atomic bomb ("A-bomb") is similar to the effects of a large high explosive ("HE" bomb). While easily misinterpreted as dismissing the post-explosion radiation hazard, the pamphlet mentions the radiation hazard being over after the "debris has stopped falling" because then, the prompt radiation hazard has largely passed. Furthermore, written before the era of the
Civil defense literature such as Survival Under Atomic Attack was common during the Cold War Era.
A Thunderbolt siren in Wisconsin