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10W电子管电视差转机推动级用的双束射四极管FU-17和功率放大级用的双束射四极管FU-10电子管,额定寿命标称为500小时,这两种管子衰老以后,差转机往往出现输出功率小的故障。如何判断该管是否衰老呢?我们知道,决定电子管质量和寿命的主要因素是阴极的发射功能。通过测量阴极电流的大小,就能基本判别电子管的发射能力的强弱。具体做法是:用一台工作正常的10W差转机,不
10W tube TV transfer machine to promote the use of dual-beam terahertz TR-17 and the power amplifier stage with a dual-beam terahertz FU-10 tube, the nominal life of 500 hours nominal, the two tubes after aging, Poor turnaround often appear small output power failure. How to determine whether the tube is aging? We know that the main factor determining tube quality and life expectancy is the cathode emission function. By measuring the size of the cathode current, we can basically determine the strength of the emission tube capacity. The specific approach is: use a working 10W transfer machine, no