. (The) oscillation valve in the transmission and reception of radio messages . o-i 0-& 0-3 0-4. Cu rmnrr §Ki(i Curreni Teletyhona Corrcnt- In the above figure graph 0-1 indicates onecycle of charging current impressed across the transmittercondenser (by a high voltage transformer, ) Assumingthe condenser to be charged twice for each cycle, thefrequency of the current is 500 cycles per second. Thedischarge of the condenser across the spark gap will giveriac to radio frequency currents. Each alternation of thecharging current, therefore, releases in the closedoscillation circuit one g
. (The) oscillation valve in the transmission and reception of radio messages . o-i 0-& 0-3 0-4. Cu rmnrr §Ki(i Curreni Teletyhona Corrcnt- In the above figure graph 0-1 indicates onecycle of charging current impressed across the transmittercondenser (by a high voltage transformer, ) Assumingthe condenser to be charged twice for each cycle, thefrequency of the current is 500 cycles per second. Thedischarge of the condenser across the spark gap will giveriac to radio frequency currents. Each alternation of thecharging current, therefore, releases in the closedoscillation circuit one group of radio frequency oscilla-tions, which are in turn induced in the antenna circuitby means of a coupling coil, and giving the oscillationsshown by graph 0-2. At the receiving station currents of similarfrequency are induced in the receiving apparatus, but asthese frequencies are above audibility no direct responseis heard in the telephone receiver. If, however, arectifier, such as a crystal of carborundum, galena,silicon, etc., in the foiro of a detector, or a vacuum tubegiving one way
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Keywords: ., bookcentury1900, bookdecade1920, bookidtheoscillati, bookyear1922
