(1) Tested RCA 6AG5 Tube with Box Date Code KH RCA Sharp Cutoff Pentode Tube

(1) Tested RCA 6CY5 Tube with Box Date Code DR Screen Grid Tetrode Tube

(1) Tested Rad-Tel 2CY5 Tube with Box Date Code 11-63 Rad Tel Tetrode Tube

(1) Tested RCA 6CY5 Tube with Box Date Code DJ Sharp Cutoff Tetrode Tube

(1) Tested Strong RCA 6BK5 Tube with Box Date Code AY Beam Power Tube

(1) Tested RCA 6DS5 Tube with Box Date Code ND Beam Power Tube

(1) Tested Raytheon 6CY5 Tube Japan with Box Date Code S-02 Tetrode Tube

(1) Tested Strong RCA 6EH5 Tube with Box Date Code ED Pentode Tube