DURANT, Okla. (KTEN)—The Durant Police Department and Durant Fire Rescue made the switch from analog radios to digital radios Tuesday morning.
As a Marine serving in the Korean and Vietnam wars, John Hopkins used line-of-sight and various portable radios, or PRCs, to communicate in the field. The “AN” in the AN/PRC-6 meant that it was a ...
The use of high-voltage power lines to carry voice signals has a history dating back to the early 1920s, with lowfrequency amplitude-modulation systems operating over lines with voltages as high as ...
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