Warning!
You would not control your car by blocking the exhaust pipe, woul you? Why treat your radio recetver in a similar way? Don't attempt to adjust the volume of your receiver by means of detuning. The quality will be sure to suffer. The best method is to control the volume before it enters the receiver, either by a variable coupling to the antenne, or by a variable resister. shunted beween antenna and ground, It 1s also wrong to control the volume in the audio stages as the detector and radio frequency valves may be running overloaded, although only medium volume may be issuing from the loud speaker.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19281102.2.47
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Radio Record, Volume II, Issue 16, 2 November 1928, Page 14
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108Warning! Radio Record, Volume II, Issue 16, 2 November 1928, Page 14
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