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

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

(1) Tested RCA 6HS8 Tube with Box Date Code AR Sharp Cutoff Twin Pentode Tube

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

(1) Tested RCA 6AU8 Tube Medium Mu Triode Sharp Cut Off Pentode Tube

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

(1) Tested RCA 6GH8A Tube with Box Date Code HE Triode Sharp Cutoff Pentode Tube

(1) Tested RCA 3DT6A Tube with Box Date Code BM Sharp Cutoff Pentode Tube