论文部分内容阅读
A-40型音频放大器是上海利闻无线电厂的产品,输出功率40瓦.在使用过程中,我们发现功率输出40瓦时失真较大,为改进其性能充分利用设备,曾作以下两点改进.原机末级是4个6ПЗС作甲乙_1类放大,是阴极偏压.要提高性能只有充分发挥4个6ПЗС作甲乙_1类工作的潜力,因此把阴极偏压改为固定偏压,同时加上帘栅稳压器,经这样改进以后,谐波失真可以减少,而输出功率亦有显著的提高.
The Model A-40 audio amplifier, a product of Shanghai Lisen Wireless Factory, has a power output of 40 W. During use, we found that the 40 W output power is distorted to a great extent and that the equipment is fully utilized to improve its performance. The following two improvements have been made . The final stage of the original machine is four 6ПЗС for Class A and B.1, which is cathode biased. To improve performance, the potential of four 6ПЗС for Class B and B work is fully utilized, so changing the cathode bias to a fixed bias, At the same time with the curtain regulator, after such improvements, the harmonic distortion can be reduced, while the output power is also significantly improved.