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Robison's Manual of radio telegraphy and telephony for the use of naval electricians (1918)

Robison, S. S. (Samuel Shelburne), b. 1867, United States Naval Institute, Todd, David Wooster, Hooper, Stanford Caldwell · Annapolis, Md. : The United States Naval Institute · leaf 149

An illustration from Robison's Manual of radio telegraphy and telephony for the use of naval electricians, 1918, leaf 149
Fig. 90.—Fessenden. … SOO VOI-TS DC Fig. 91.—Fessenden Heterodyne. We see, therefore, that by varying the heterodyne by means of thevariable condensers shown in fig. 91, we can produce any desired note atthe receiving station. It is not necessary that the heterodjTie should be in the same room oreven in the immediate…

Telegraph, Wireless -- Handbooks, manuals, etc · Telephone, Wireless -- Handbooks, manuals, etc · Radio -- Handbooks, manuals, etc

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