(1) Tested Raytheon 12A5 Tube Engraved Base Power Amplifier Pentode Tube

(1) Tested RCA Cunningham Type 41 Tube Engraved Base Date Code J12 Power Pentode

(1) Tested Philco Type 33 Tube Engraved Base Date Code PB Power Pentode Tube

(1) Tested RCA Cunningham Type 41 Tube Engraved Base Date Code J3 Power Pentode

(1) Tested Philco Type 41 Tube Date Code 6S Engraved Base Power Pentode 41 Tube

(1) Tested RCA Type 41 Tube Date Code H6E Meatball Logo Power Pentode 41 Tube

(1) Tested Philco Type 41 Tube Date Code 7U Engraved Base Power Pentode Tube

(1) Tested RCA Cunningham Type 55 Tube Date Code F2 Engraved Base RCA 55 Tube