MEASURING INTERFERENCE
The Post office is responsible for all telecommunications ; one of its tasks is to measure interference with radio signals
Hi-Res image available upon request
Picture No
10091687
Media ID
48895650
Credit
Mary Evans Picture Library
Source
Cigarette card, Lambert & Butler series, Interesting sidelights on the work of the General Post Office'
Date
1939
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Interference Measure Measuring Responsible Signals Tasks Telecommunications
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