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

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

(1) Tested RCA 6GY6 Tube Date Code 65-48 6GY6 Sharp Cutoff Pentode Tube

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

(1) Tested Very Strong RCA 6GY6 Tube Date Code CT 6GY6 Sharp Cutoff Pentode Tube

(1) Tested Strong Sylvania 6BH6 Tube Date Code 013 AMC Sharp Cutoff Pentode Tube

(1) Tested Philco 6AU6 Tube Date Code 247 Philco 6AU6 Sharp Cut Off Pentode

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