| 词条 | 866A |
| 释义 |
|image = 866 mercury rectifier 1.jpeg |caption = Westinghouse 866A mercury vapor half-wave rectifier tube. |classification = Diode |cathode_type = Directly heated |heater_voltage = 2.5 |heater_current = 5 A |max_current = 250 mA |max_voltage = 5000 |reference = RCA Transmitting Tube Manual TT-3, 1940 }} The 866 is a mercury vapor half-wave rectifier intended for high-voltage applications. The voltage drop is approximately 15 volts up to 150 Hz. To avoid unwanted shorts the tube must be operated in a vertical position and the filament preheated for at least 30 seconds before applying the plate voltage.[1] ConstructionStructurally, it consists of a linear electrode arrangement; a cup shaped anode with top cap and a cylindrical cathode. The socket is a medium 4 pin bayonet UX-4 and the glass envelope is ST-19. The 2.5 volt/ 5 Amp filament is connected to pins 1 and 4. OperationUnder normal operating conditions the tube glows blue and mercury droplets are visible. Pictures in working conditions{{Gallery| lines = 4 |File:866_mercury_rectifier_glow_5mA.jpeg|Westinghouse 866A mercury vapor half-wave rectifier tube. Glowing with 5mA |File:866_mercury_rectifier_glow_5mA_dark_environ.jpeg|Westinghouse 866A mercury vapor half-wave rectifier tube. Glowing with 5mA in the dark (long exposure) |File:866 mercury rectifier glow 180mA dark environ.jpeg|Westinghouse 866A mercury vapor half-wave rectifier tube. Glowing with 180mA in the dark. }} References1. ^{{cite web|url=http://www.uli.de/tubes/866a.htm|title=866|website=www.uli.de}} Further reading
| title = RCA Transmitting Tube Manual TT-3 | publisher = Radio Corporation of America | year = 1940 | pages = 64–65 }} External links
2 : Vacuum tubes|Electric power conversion |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。