. Practical wireless telegraphy; a complete text book for students of radio communication . APPLIANCES FOR A RADIO TRANSMITTER. 113 SECONDRRr TCKMIN/M-S. (NALS. SeCOWDARYWINOINSS. CORE Fig. 132 shows the construction of the closed core transformers. The coreis rectangular and made up of thin sheets of iron which are insulated from oneanother. The primary and secondary windings are mounted one over the otheron the middle leg. The entire transformer is immersed in a semi-liquid grease,which softens at about 115 degrees Fahrenheit. The closed core trans-former is now supplied withall Marcon
. Practical wireless telegraphy; a complete text book for students of radio communication . APPLIANCES FOR A RADIO TRANSMITTER. 113 SECONDRRr TCKMIN/M-S. (NALS. SeCOWDARYWINOINSS. CORE Fig. 132 shows the construction of the closed core transformers. The coreis rectangular and made up of thin sheets of iron which are insulated from oneanother. The primary and secondary windings are mounted one over the otheron the middle leg. The entire transformer is immersed in a semi-liquid grease,which softens at about 115 degrees Fahrenheit. The closed core trans-former is now supplied withall Marconi sets. It has theadvantage of efficiency, andcheapness of construction,and requires but a smallamount of space for erec-tion. A safety gap is providedto protect the secondarywinding in case, the rotarygap is thrown out ofsynchronism with thecharging current. In eventof such happening, thespark will discharge acrossthe gap and also to earththrough a third electrode(the metallic cone-shapedprojection on the case).The transformer case isconnected to earth. If thetransformer is to be takenFig. 132—Showing^Coi^truction^of 2 K. W. Closed apart to replace the wind- ings, in cold cli
Size: 1352px × 1849px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecttelegra, bookyear1917
