(1) Tested GE 6J6A Tube Code CW General Electric 6J6 A Medium Mu Twin Triode

(1) Tested GE 6J6A Tube Code SW General Electric 6J6 A Medium Mu Twin Triode

(1) Tested GE 6J6A Tube Code RY General Electric 6J6 A Medium Mu Twin Triode

(1) Tested GE 6J6A Tube Date Code SU GE 6J6 A Tube Medium Mu Twin Triode

(1) Tested RCA 6J6A Tube Date Code MZ RCA 6J6 A Tube Medium Mu Twin Triode Tube

(1) Tested RCA 6J6 Tube Medium Mu Twin Triode Tube (a)

(1) Tested Philco 6J6 Tube Date Code 50-16 Medium Mu Twin Triode 6J6 S Tube

(1) Tested Raytheon 6J6 Tube with Box Date Code 626 Medium Mu Twin Triode Tube