. Elements of radio telephony . £., Wire Telephone =H1=^ Line Wires ReceiverMicroplione Antennae PeceiWngSef: 3/A?Ay Moc/ulatt>rOscillator \ -<^ ,^^, Bcdkr)sci I. = 1.—Graphical comparison of wire andjadio telephone systems. which two carbon discs are situated and insulated from oneanother. One disc is stationary and the other is attachedto the diaphragm and free to move with it. The spacebetween the two discs is loosely packed with carbon grainsabout the size of a pin head. The carbon granules have theproperty of varying the electrical resistance between the twocarbon discs,
. Elements of radio telephony . £., Wire Telephone =H1=^ Line Wires ReceiverMicroplione Antennae PeceiWngSef: 3/A?Ay Moc/ulatt>rOscillator \ -<^ ,^^, Bcdkr)sci I. = 1.—Graphical comparison of wire andjadio telephone systems. which two carbon discs are situated and insulated from oneanother. One disc is stationary and the other is attachedto the diaphragm and free to move with it. The spacebetween the two discs is loosely packed with carbon grainsabout the size of a pin head. The carbon granules have theproperty of varying the electrical resistance between the twocarbon discs, which resistance depends upon the degree of WIRE AND RADIO TELEPHONE SYSTEMS 3 pressure applied to the granular carbon. When the carbongranules are tightly compressed their resistance is low and diaphragm carbon granules
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectradio, bookyear1922
