(1) Tested GE 6JD6 Tube with Box Date Code JR General Electric Pentode Tube

(1) Tested GE 6JC8 Tube with Box Date Code SC General Electric Triode Pentode

(1) Tested GE 12BD6 Tube with Box Date Code 9-22 General Electric 12BD6 Pentode

(1) Tested GE 6CU5 with Box Date Code LW General Electric Power Pentode Tube

(1) Tested GE 6J6 Tube Date Code 56-22 General Electric Medium Mu Twin Triode

(1) Tested GE 12AL5 Tube with Box Date Code 60-17 General Electric Twin Diode

(1) Tested GE 6DN6 Tube Date Code MU General Electric 6DN6 Beam Power Tube (a)

(1) Tested Strong GE 6W4GT Tube Date Code 2-22 General Electric 6W4 GT Tube