High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 81
in shellac. A submersion of an hour will haveserved largely to fill the interstices between wires and tosoak the ribbon thoroughly. The core is then hung up todrain and dry. The latter operation will take the best partof 24 hours. When the shellac is hard, the core will bealmost as solid as if it… … End of winding held under tape Fig. 29.—Core and primary, showing how finishing end of primary winding is held under a loop of tape silk ribbon on the core and the winding started by turningthe core with both hands. The second turn of wire gripsthe ribbon loop and thus secures the starting turn.…
Electric apparatus and appliances
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