(1) Tested Admiral 8FQ7 Tube Date Code 270-17 Japan Medium Mu Twin Triode Tube

(1) Tested Sylvania 17JZ8 Tube with Box Date Code dg AOR Triode Beam Pentode

(1) Tested Zenith 6KA8 Tube Date Code 72-17 Great Britain Triode Pentode Tube

(1) Tested Sylvania 6JZ8 Tube with Box Date Code hl AAO Medium Mu Triode Pentode

(1) Tested RCA 6AZ8 Tube with Box Date Code KG Medium Mu Triode Cutoff Pentode

(1) Tested Philco 8FQ7 Tube Date Code N-41 Japan Medium Mu Twin Triode Tube

(1) Tested RCA 35DZ8 Tube with Box Date Code MI High Mu Triode Power Pentode

(1) Tested Sears 8JV8 Tube Japan Date Code 6K High Mu Triode Cutoff Pentode