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

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

(1) Tested GE 6AX3 Compactron Tube with Box Date Code JF Half Wave Rectifier

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

(1) Tested Very Strong RCA 6BK4B Tube with Box Date Code CB Diode

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

(1) Tested Very Strong RCA 6BK5 Tube with Box Date Code CL RCA 6BK5 Tube (c)

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