(1) Tested RCA 6AU8 Tube with Box Date Code KQ Triode Pentode Tube

(1) Tested RCA 5X8 Tube with Box Date Code KP Triode Pentode Tube

(1) Tested GE 5AN8 Tube with Box Date Code 59-04 General Electric Triode Pentode

(1) Tested RCA 5BR8 Tube with Box Date Code AQ Medium Mu Triode Cutoff Pentode

(1) Tested RCA 5CG8 Tube with Box Date Code KR Triode Pentode Tube

(1) Tested RCA 8CX8 Tube with Box Date Code BJ Triode Pentode Tube

(1) Tested RCA 6BH8 Tube with Box Date Code BZ 6BH8 Triode Pentode Tube

(1) Tested Sylvania 5X8 Tube with Box Date Code df JAS Triode Pentode Tube