The filament circuit can provide DC filament voltage for the magnetron.
灯丝电路供给磁控管直流灯丝电压。
Line frequency hum, primarily induced by imbalance in the filament circuit wiring, the transformer used to power the filament, coupling into the signal leads, etc.
市电频率Hum， 主要原因包括灯丝线路走线导致的不平衡；供给灯丝的电源变压器（缺陷）导致电源杂波耦合进入信号通道，等等。
When a silver filament reaches the gold, it forms a short circuit, causing a dramatic change in conductance, which is easily detectable.
当一根银丝极到达金线时，它将形成一种短路，从而导致电导发生一种惊人的变化。科学家可以容易地对此进行检测。
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