论文部分内容阅读
我们经过了多次的试验,证明了SZ-1型失真仪的50赫噪声,主要是由于电子管6V6(6∏1∏)的灯丝和阴极之间漏电而引起(说明见本刊第6期47页).虽然在灯丝电路中,已采用了电位器中点接地来加以平衡,但经常还是不能满足技术条件所规定的要求.其原因是由于变压器的灯丝绕组对地的分布电容的不同,加上电子管灯丝两端对阴极的干扰也各有差异.因此,只采用电位器是不能同时平衡其幅度和相位的,故必须适当地使用电容器来补偿其相位差,以使灯丝两端
We have been tested several times to prove that the 50 Hz noise of the SZ-1 distortion device is mainly due to the leakage between the filament and the cathode of the 6V6 (6Π1Π) tube (for details, see Issue 6, Issue 47 Page.) Although the filament circuit has been used to balance the grounding of the mid-point potentiometer, but often can not meet the requirements specified by the technical conditions.The reason is due to the transformer filament winding distribution of ground capacitance is different, plus Therefore, only the potentiometer can not balance the amplitude and the phase at the same time, so the capacitor must be properly used to compensate the phase difference, so that both ends of the filament