10-04-2014, 11:24 AM
VHF WIRELESS COMMUNICATION (WALKI TALKI)
WIRELESS COMMUNICATION.pptx (Size: 677.23 KB / Downloads: 13)
introduction
The first radio receiver/transmitter to be widely nicknamed "Walkie-Talkie" was the backpacked motorla scr-300,created by an engineering team in 1940 at the Galvin Manufacturing Company.
It alsoproduced the hand-held AM SCR-536 radio during World War II, and it was called the "Handie-Talkie“.
The terms are often confused today, but the original walkie talkie referred to the back mounted model, while the handie talkie was the device which could be held entirely in the hand Both devices ran on vand used vaccum tube high voltage dry cell batteries.