Radio Phone Receiving a Practical book for Everybody
The book Radio Phone Receiving a Practical book for Everybody was written by author Erich Hausmann Here you can read free online of Radio Phone Receiving a Practical book for Everybody book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Radio Phone Receiving a Practical book for Everybody a good or bad book?
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The leads of the telephones are close together for a length of several feet. They then may be considered as constituting the two plates of a condenser. Also, between the turns in the winding of the telephones such condenser action occurs. It will then be seen that even if the con- denser be omitted, a certain amount of capacitance will still be distributed along the circuit of the tele- phones which acts in place of condenser /, and so permits operation. As this capacitance is slight, the opera...tion is poorer than if the condenser had been used. The telephone of the radio receiver consists of a permanent magnet, around each pole of which is wound a bobbin of wire. The greater the number of turns in each of these bobbins, the more sensitive will the telephones be. In good telephone sets, the number of turns reaches many thousands, and the wire used is necessarily very fine ; as a result the re- sistance of the sets is high. The resistance of the telephones may be taken as an indication of the number of turns on the bobbins, and consequently of the relative sensitivity of the telephones.
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