(1) Tested Sylvania 6JC8 Tube with Box Date Code NR EDF Triode Pentode Tube

(1) Tested Strong RCA 8GN8 Tube with Box Date Code AV Triode Pentode Tube

(1) Tested RCA 6AU8 Tube with Box Date Code KQ Triode Pentode Tube

(1) Tested Sylvania 6GH8A Tube with Box Date Code ae Triode Sharp Cutoff Pentode

(1) Tested RCA 6JV8 Tube and Box Date Code BZ Triode Pentode Tube (b)

(1) Tested Sylvania 6JV8 Tube with Box Date Code NR AAA Triode Pentode Tube

(1) Tested Westinghouse 6GH8A Tube with Box Date Code 70-22 Triode Pentode

(1) Tested Very Strong GE 6JC8 Tube with Box Date Code CV Triode Pentode Tube