RCA Radiotron 6AT8A Triode-Pentode Converter Tube NOS Quantity TESTED

(1) Tested Philco 6X8 Tube Triode Pentode Converter Tube

(1) Tested Tung Sol 6X8 Tube with Box Code KR3 Triode Pentode Converter Tube

RCA Radiotron 6BE6 Pentagrid Converter Tube NOS Quantity Tested

(1) Tested Rad-Tel 6X8 Tube Date Code 5-66 6X8 Triode Pentode Converter Tube

6BA7 RCA Radiotron Pentagrid Converter Tube NOS Quantity TESTED

(1) Tested RCA 6X8 Tube with Box Date Code 4-52 Triode Pentode Converter Tube

RCA Radiotron 6AF4A UHF Triode Tube NOS Quantity TESTED