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 153
Fig. 71.—The rotary and stationary spark gap Fig. 72 shows the oscillation transformer w^iich steps1 tip the high frequency current. In Fig. 73 is showai the winding machine, of wood, upon w^hich the cardboard coneis wound. 148 HIGH FREQUENCY APPARATUS The oscillation transformer may be purchased,… … Fig. 72.—The complete oscillation transformer wood are cut by means of a scroll saw and mounted upon alength of dowel rod which is in turn carried in the simplewooden uprights which form the bearings. Slats of thinwood are then nailed to the discs to form the conical cage.
Electric apparatus and appliances
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