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故障一开机后加速电压正常，灯丝加热时，无束流指示。灯丝电源电路工作原理：电子枪灯丝工作时要求有一个３Ｖ、３Ａ的稳定电源供给灯丝，为了使此电源不对加速电源产生干扰，采用高频振荡电路。该电路由电子管ＦＵ－５０及其外围元件组成电容耦合三点式自激振荡电路，经...
Failure to start a normal acceleration voltage, the filament heating, no beam instructions. Filament power circuit works: Electron gun filament work requires a 3V, 3A stable power supply filament, in order to make this power supply does not interfere with the acceleration of power supply, the use of high-frequency oscillator circuit. The circuit consists of a tube FU-50 and its peripheral components of capacitive coupling three-point self-oscillation circuit, ...