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Radio Record, Volume I, Issue 35, 16 March 1928, Page 9

ee The simplest, and what is said by American radio engineers to be the most efficient, method of controlling the volume of a radio receiver is accomplished by inserting an ordinary variable condenser in series with the aerial lead wires to the set, Maximum read. ing on the dial will give the greatest volume, and minimum the least, Such an arrangement does not change eharacteristics of the set, which would be_ apt to destroy the quality of reproduc tion. ¥