. An elementary manual of radiotelegraphy and radiotelephony for students and operators . ,ement will act asa magnifier of telephonic speech. It is well known that if amicrophone, battery, and telephone receiver are connected in seriesthat when the receiver is approached to the transmitter thearrangement begins to sing spontaneously and emits a musical Pig. 10. The explanation of ihis is as follows: Stray sounds start thediaphragm of the transmitter in vibration. This starts thereceiver diaphragm vibrating and it emits a sound. This soundincreases the amplitude of the transmitter vibrat
. An elementary manual of radiotelegraphy and radiotelephony for students and operators . ,ement will act asa magnifier of telephonic speech. It is well known that if amicrophone, battery, and telephone receiver are connected in seriesthat when the receiver is approached to the transmitter thearrangement begins to sing spontaneously and emits a musical Pig. 10. The explanation of ihis is as follows: Stray sounds start thediaphragm of the transmitter in vibration. This starts thereceiver diaphragm vibrating and it emits a sound. This soundincreases the amplitude of the transmitter vibrations, and so thetwo act and react on each other until a loud sound is emitted bythe receiver. Returning, then, to the arrangement in Fig. 10, if the two trans-formers are connected together, as suggested by Messner in 1913,the arrangement will act like a coupled microphone and telephone,and electric oscillations when once set up will be sustained. Starting from this fact, Mr. H. J, Round has develoi^ed a glowlamp valve generator, for generating perfectly smooth oscillationsin a transmitting aerial. These are modulated to speech form by 344 EA DIO TEL E GRA PHY
Size: 2445px × 1022px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1916
