The thermionic vacuum tube and its applications (1920)
Van der Bijl, Hendrik Johannes, 1887- · New York McGraw-Hill Book, Co · leaf 359
the receiver. The audibihty method, which will bediscussed later on, has been suggested to measure detecting cur-rents with a telephone receiver. It consists in shunting the tele-phone receiver with a variable resistance and adjusting thisresistance until the current in the telephone receiver is… … Plafe Vol+age Fig. 201. to the current in the receiver alone, measures what is known as the audibility. This method is not very reliable, and its accuracydepends to a large extent on the conditions under which themeasurements are made (see Section 108). The following method requires only that two…
Telegraph, Wireless
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