12AU7

12AU7

12AU7 is a miniature 9-pin medium-gain dual triode vacuum tube. It belongs to a large family of dual triode vacuum tubes which share the same pinout (EIA 9A). 12AU7 is also known in Europe under its Mullard-Philips tube designation ECC82.

The tube is popular in hi-fi vacuum tube audio as a low noise line amplifier, driver and phase-inverter in vacuum tube push-pull amplifier circuits. There are opinions which indicate that this popularity is caused by audiophile industry/media polarization, not by its performance. Lynn Olson. [http://www.nutshellhifi.com/library/illusion-engines.html Illusion Engines (2005)] ] The tube has a center tapped filament so it can be used in either 6.3V 300mA or 12.6V 150mA heater circuits.

Current production of 12AU7 takes place in Russia, Slovakia, Serbia and China.

ee also

*12AX7
*12AT7

References

External links

* [http://www.nj7p.org/Tube4.php?tube=12AU7 12AU7 datasheet from the RCA RC-29 Receiving Tubes Manual] (NJ7P Tube Database)


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