(1) Tested Sylvania 6CL3 Tube with Box Date Code NR Half Wave Rectifier Tube

(1) Tested Tung-Sol 6W4GT Tube Date Code 528-3 6W4 GT Half Wave Rectifier

(1) Tested Sylvania 6AY3 Tube with Box Date Code mk RAF Half Wave Rectifier

(1) Tested GE 35W4 Tube with Box Date Code 63-48 Red Letter Half Wave Rectifier

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

(1) Tested RCA 6CK3 Tube with Box Half Wave Rectifier Tube

(1) Tested Zenith 6AY3 Tube with Box Date Code 6243 Half Wave Rectifier

(1) Tested GE 35W4 Tube Date Code 61-22 35W4 Half Wave Rectifier