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

(1) Tested Philco Starlight 6AU8A Tube with Box Date Code 67-09 Triode Pentode

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

(1) Tested RCA 6BH8 Tube with Box Date Code BZ 6BH8 Triode Pentode Tube

(1) Tested GE 6JC8 Tube with Box Date Code SC General Electric Triode Pentode

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

(1) Tested RCA 6AW8A Tube with Box Date Code BH 6AW8 A Triode Pentode (b)

(1) Tested Philco 6JE8 Tube Date Code EBF High Mu Triode Sharp Cutoff Pentode