| 摘要 |
PURPOSE:To converge three beams irrespective of horozontal deflection frequency, by matching rectangular patterns through two specific deflection frequencies in a magnetic controller for an electron gun. CONSTITUTION:The material for shunts 8', 9' and an enhancer is changed from permalloy to ferrite in order to coinicide the permeabilities of an element at the deflection frequencies of 15,75MHz and 31.75kHz. Said shunts 8', 9' and the enhancer made of ferrite is shaped to converge three beams and inserted into a hole made through a cup electrode 15 of an electron gun then secured reliably through a press board 16 to the cup electrode 15. Consequently, three beams can be converged irrespective of the horizontal deflection frequency. |
