(1) Tested RCA 12DB5 Tube with Box Date Code MI RCA Beam Power Tube

(1) Tested RCA 6AQ5A Tube RCA 6AQ5 A Date Code 69-39 Beam Power Tube

(1) Tested RCA 6DS5 Tube with Box Date Code ND Beam Power Tube

(1) Tested Strong RCA 6BK5 Tube with Box Date Code AY Beam Power Tube

(1) Tested Sylvania 7C5 Tube Date Code 813 Sylvania 7C5 Loctal Beam Power Tube

(1) Tested ITT 7A4 Tube with Box Code 126 Loctal Tube Medium Mu Triode Tube

(1) Tested RCA 6CU5 with Box Date Code NF Black Plate Beam Power Pentode Tube

(1) Tested CBS Hytron 50A5 Tube Loktal Tube 50A5 Loctal Beam Power Tube