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Sentinel IU-358
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10-12-2010, 11:52 AM
PaulOF
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Join Date: Nov 2006
Location: Philadelphia, PA
Posts: 97
This link gives some information. Every radio when I was growing up had the little white triangles, and I remember lots of public service ads on radio, tv, and in print reminding us to tune to 640 or 1240 in the event of an attack.
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