Google "6aq5 datasheet tdsl" and choose the Duncan amps "tube data sheet locator" or TDSL link. Once there you can find your way to the appropriate data sheet for them.
Short shrift is they are very similar to a 6V6 tube although I wouldn't exceed their max voltage ratings to the degree that folks do with 6V6s. They are good sounding in the right circuit with surprisingly full but tight low end.
Hope this helps.