电子管音频功率放大器的制作教程：电子管音频功率放大器，以其卓越的重放音质，广受HiFi发烧友的青睐。市售成品电子管功放动辄数千元，乃至上万元，如此高价是大多数爱好者无法企及的。爱好者说得好：“自己动手，丰衣足食”。和大家分享！-Production of audio power amplifier tube tutorial: tube audio power amplifier, with its excellent playback quality, popular HiFi enthusi

花一万元买的高速PCB设计讲义，共给大家学习参考。-Spend a million on the purchase of high-speed PCB design notes of reference for everyone to learn.

51CTO下载-PCB高级设计系列讲义(价值上万元)-51CTO download-PCB Design Series lecture notes (the value of the yuan)