(1) Tested RCA 6DE4 Tube Date Code BV 6DE4 Half Wave Rectifier Vacuum Tube

(1) Tested RCA 6DE4 Tube Coin Base Date Code CV Half Wave Rectifier Tube

(1) Tested RCA 1N2A Tube Date Code MD RCA 1N2 A Half Wave Rectifier Tube

(1) Tested RCA 6CL3 Tube with Box Date Code C3 Half Wave Rectifier Tube

(1) Tested Very Strong RCA 1J3 Tube Date Code MP Half Wave Rectifier Tube

(1) Tested RCA 6AX4GT Tube Date Code KY RCA 6AX4 GT Half Wave Rectifier Tube

(1) Tested CBS 6W4GT Tube Date Code CN CBS 6W4 GT Half Wave Rectifier

(1) Tested RCA 6DE4 Tube with Box Date Code AL RCA 6DE4 Half Wave Rectifier