(1) Tested RCA 25Z6GT Tube. Date Code 243.
(1) Tested Strong RCA 6CL6 Tube Date Code EK RCA 6CL6 Power Pentode Tube (b)
(1) Tested Strong RCA 6AU4GTA Tube Date Code L1 RCA 6AU4 GTA Tube
(1) Tested Strong RCA 6W6GT Tube Date Code KO RCA 6W6 GT Beam Power Tube
(1) Tested Strong RCA 6CL6 Tube Date Code EK RCA 6CL6 Power Pentode Tube (d)
(1) Tested Strong RCA 6AU4GTA Tube Date Code KQ RCA 6AU4 GTA Rectifier Tube
(1) Tested Strong RCA 12L6GT Tube Date Code ND 12L6 GT Tube Beam Power Tube (a)
