(1) Tested Philco 6AU8A Tube with Box Date Code 6504 Triode Pentode

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

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

(1) Tested GE 6BA8A Tube Date Code 62-35 Medium Mu Triode Cutoff Pentode 6BA8 A

(1) Tested Westinghouse 6KA8 Tube with Box Date Code 67-43 Triode Pentode Tube

(1) Tested GE 6BA8A Tube Date Code 61-04 Medium Mu Triode Cutoff Pentode 6BA8 A

(1) Tested Sylvania 6JT8 Tube with Box Date Code bk Sylvania 6JT8 Triode Pentode

(1) Tested GE 6JV8 Tube with Box Date Code FI General Electric Triode Pentode