(1) Tested Ken Rad 12K8Y Tube VT-132 Date Code 18 Triode Hexode 12K8 Y Tube

(1) Tested Balanced 1944 RCA JAN CRC 1635 Tube with Box Date Code H3 Dual Triode

(1) Tested RCA JAN CRC 12SF7 Tube Date Code H5E Mil Spec 12SF7 Cutoff Pentode

(1) Tested Ken-Rad 12K8 Tube Date Code K5-R GE EIA Triode Hexode Converter Tube

(1) Tested RCA 12K8 Tube Date Code 109 Black Metal Triode Hexode Converter Tube

(1) Tested Ken Rad 12K8Y Tube with Box Date Code L3 Triode Hexode VT-132 Tube

(1) Tested 1944 Mil Spec RCA JAN CRC 12SF7 Tube with Box Date Code H5E (b)

(1) Tested RCA JAN CRC 1635 Tube Date Code H4E Mil Spec Dual Triode Tube