(1) Tested Sylvania 6AU6 Tube Sylvania Sharp Cut Off Pentode Tube

(1) Tested Philco 6BC5 Tube Date Code 5311 Sharp Cutoff Pentode Tube

(1) Tested Sylvania 12GN7A Tube Sharp Cutoff Pentode 12GN7 A Tube

(1) Tested Philco 6AU6 Tube Date Code 3031 Philco 6AU6 Sharp Cut Off Pentode

(1) Tested Magnavox 6EW6 Tube Date Code 3-26 Sharp Cutoff Pentode Tube

(1) Tested Tung Sol 6AC7 Tube Date Code 540-3 Sharp Cutoff Metal Pentode Tube

(1) Tested Sylvania 6EW6 Tube Date Code 548 Sharp Cutoff Pentode Tube

(1) Tested GE 6EW6 Tube Date Code 64-26 Sharp Cutoff Pentode Tube