(1) Tested RCA 6EB8 Tube Date Code AP High Mu Triode Pentode Tube

(1) Tested Tung-Sol 6AW8A Tube Date Code PRI 6AW8 A High Mu Triode Pentode

(1) Tested RCA 6JN8 Tube Date Code BW Triode Pentode Vacuum Tube

(1) Tested RCA 6JV8 Tube with Box High Mu Triode Sharp Cutoff Pentode Tube

(1) Tested RCA 6EH8 Tube with Box Date Code CQ Triode Pentode Vacuum Tube

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

(1) Tested RCA 6AW8A Tube and Box Date Code BH 6AW8 A High Mu Triode Pentode (a)

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