พอได้ข้อมูลมานิหน่อยฮ่ะครับ ใช่ไม่ใช่ช่วยบอกด้วยครับ [6202 Valve] [AEI] [Amperex] [Apollo] [Arcturus] [BAF] [Beam Tube Corp] [Bentley Acoustic Corporation] [Brimar] [BTH] [Centronic UK] [Chatham Electronics] [Cintel] [Collins] [Colomor] [Cosmos] [Cossor] [De Forest] [Ediswan] [Eimac Electronic Enterprises Inc] [Elpico] [EMI EMI Varian Emitron] [English Electric Ericson] [ETL Ever Ready] [Ferranti] [Fotos] [GE GEC General Electric] [Granada] [Hamamatsu] [Harvey-Burnham] [Hivac] [Hytron] [Impex Radio] [ITT] [Ken-Rad] [Lewis & Kaufman] [lissen] [Machlett Manufacturers Supply Company (Wickham) Ltd] [Marconi] [Marconiphone] [Matsushita] [Mazda] [Metropolitan] Vickers] [M-OV] [Mullard] [MWT] [National Union] [NEC] [Osram] [Philco] [Philips] [Pinnacle] [Pope] [Radiotron] [Radiovisor] [Rank] [Raphone] [Raytheon] [RCA] [Rogers] [RTC] [Russian] [Sharp] [Siemens] [Sicte] [Slater Sperry] [STC] [Shuguang] [Sylvania] [Taylor Tubes] [TEL] [Telefunken] [Tesla] [Thorpe] [Toshiba] [Tsushin] [triotron] [Tung-Sol] [Tungsram] [United Electronics Company Vacuum Science Products] [Valve Art] [Valvo] [Varian] [Weco] [Wehrmacht] [Western Electric] [Westinghouse] [Zaerix]
