. The principles underlying radio communication . ity C, while subjecting each condenser to only half thfrfull voltage. TKANSM 1TTI NO APPARATUS. Inductance Coils.—The principal inductance coils in a radio set arethe primary and secondary of the oscillation transformer and the an-tenna loading coil, and the three corresponding coils of the receivingset. The three coils, oscillation primary and secondary and loadingcoil, are very similar. In actual practice few operators know evenapproximate values of the inductances ; a standard form is deed, depend-ing somewhat on the size of the set, and adj
. The principles underlying radio communication . ity C, while subjecting each condenser to only half thfrfull voltage. TKANSM 1TTI NO APPARATUS. Inductance Coils.—The principal inductance coils in a radio set arethe primary and secondary of the oscillation transformer and the an-tenna loading coil, and the three corresponding coils of the receivingset. The three coils, oscillation primary and secondary and loadingcoil, are very similar. In actual practice few operators know evenapproximate values of the inductances ; a standard form is deed, depend-ing somewhat on the size of the set, and adjustments by clips or tapsenable the proper values to be used. In order to design a set the in-ductances of the coils are calculated and an allowance made for thesmall inductance in the leads and other parts of the circuit. The formusually used for coils in transmitting circuits is either the helix (singlolayer spaced coil) of round wire or edgewise wound strip, Figs. 207 and208, or the flat spiral or pancake of bare metal ribbon, Figs. 209 and. ;5. 212 Cr»J* Action »f MolhUyer coil
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Keywords: ., bookcentury1900, bookdecade1920, bookpublisherwashi, bookyear1922
