標題: Marketing Vacuum Tubes, Sockets, Capacitors, Etc. [打印本頁] 作者: RodneyY49 時間: 2025-4-8 02:37 標題: Marketing Vacuum Tubes, Sockets, Capacitors, Etc. Nearly all huge power tubes made use of in radio transmitters utilize thoriated filaments, as do some glass tubes made use of in hi-fi amps.