(1) Tested GE 5X8 Tube with Box Date Code FV General Electric Triode Pentode

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

(1) Tested RCA 6EH8 Tube with Box Date Code CQ Triode Pentode Vacuum Tube

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

(1) Tested RCA 6GH8A Tube with Box Date Code HE Triode Sharp Cutoff Pentode Tube

(1) Tested RCA 6JV8 Tube with Box High Mu Triode Sharp Cutoff Pentode Tube

(1) Tested Sylvania 12JN8 Tube with Box Date Code YAA Triode Pentode Tube (a)

(1) Tested Strong RCA 8GN8 Tube with Box Date Code AV Triode Pentode Tube