(1) Tested Strong RCA 6DW4B Tube Date Code CL Half Wave Rectifier

(1) Tested Strong Compactron 6DW4B Tube Half Wave Rectifier Tube

(1) Tested Strong Sylvania 6DW4B Tube Date Code KUA Half Wave Rectifier

(1) Tested Strong RCA 6DW4B Tube Date Code B4 Half Wave Rectifier

(1) Tested Very Strong RCA 6AF3 Tube with Box Date Code ND Half Wave Rectifier

(1) Tested Strong Motorola 19AU4 Tube Date Code 5727 Half Wave Rectifier

(1) Tested Sylvania 6DE4 Tube Date Code am EEL Sylvania 6DE4 Half Wave Rectifier

(1) Tested Raytheon 6W4GT Tube Date Code 1-13 6W4 GT Half Wave Rectifier