6AQ5
From Wikipedia, the free encyclopedia
The 6AQ5 is a miniature 7-pin output pentode with ratings very similar to the 6V6, which was commonly used as an output audio amplifier in tube TVs and radios. It is also known under its Mullard-Philips tube designation EL90. A version of the tube with extended ratings for industrial application is designated 6AQ5W or 6005.
References:
[1] - 6AQ5 datasheet from the RCA RC-29 Receiving Tubes Manual (NJ7P Tube Database)