Xf2 b9h2 / 102 % gm (sold) ~ xf2 b2f1 / 105 % gm (sold) ~ xf2 b5l3 / 98 % ~ xf2 b8b4 / 97 % gm (65 good). el34 has a tenured history, known for its pronounced + distinct distortion characteristics vs. other power tubes such as 6550.
eBay