The 6AQ5 (Mullard-Philips tube designation EL90) is a miniature 7-pin (B7G) audio power output beam tetrode vacuum tube with ratings virtually identical to the 6V6 at 250V. It was commonly used as an output audio amplifier in tube TVs and radios. There are versions of this tube with extended ratings for industrial application which are designated as 6AQ5A and 6005W.

A push-pull pair is capable of producing at least 10W audio output power in class AB1.

Other close or equivalent tube types are: 6HG5, 6HR5, 6669, 6BM5, N727, CV1862 and the Tesla 6L31. The 6P1P, while electrically equivalent, has a 9 pin (B9A) base. Another similar, but not identical, amplifier pentode with a miniature 9-Pin base, (B9A), used in consumer electronics was the 6M5.

References

http://www.tubezone.net/pdf/6aq5el90.pdf - 6AQ5 datasheet from tubezone.net

See also

• List of vacuum tubes
• Several tube data sheets