电子管扩音机以其失真小、功率大、过载能力强、可靠性高而著称,尤以它的音质甜美丰满、圆润动听而倍受人们青睐,成为近年来众多“发烧友”追随的目标。但是,电子管扩音机的核心部件——电子管,是靠阴极加热后发射电子而工作的,由于灯丝经常受开机瞬间冷电流的冲击,再加上电源电压不稳定等因素,灯丝的正常寿命会受到一定的影响,比较容易老化。尤其是灯 Tube amplifiers are known for their small distortion, high power, high overload capability and high reliability, especially their sweet, plump, mellow and beautiful sound, which have become the target of many “enthusiasts” in recent years. However, the core part of the tube amplifier - the tube, is based on cathode heating emit electrons and work, because the filament is often affected by the instant cold current impact, coupled with the power supply voltage instability and other factors, the normal life of the filament will be a certain The impact of aging more easily. Especially the lights