Crt focus tracking arrangement

Details Crt focus tracking arrangement Crt focus tracking arrangement

H - Electricity

01

F

336/66, 350/99

H01F 38/42 (2006.01)

Patent

CA 1262479

ABSTRACT OF THE DISCLOSURE A video display apparatus includes a cathode ray tube and a high voltage transformer. The high voltage transformer incorporates a high voltage winding having a tap which provides a focus voltage for the electron gun assembly of the cathode ray tube. The transformer also includes a supply winding which provides power to the electron gun assembly drive circuit. The supply winding is wound to be closely coupled to the portion of the high voltage winding not associated with the generation of focus voltage so that increasing beam current produces nonuniform loading of the high voltage winding.

508066

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