(1) Tested Philco 6BA6 Tube Date Code 5021 Remote Cutoff Pentode Tube

(1) Tested Philco 6BA6 Tube Date Code 51-12 Remote Cutoff Pentode Tube (b)

(1) Tested Tung-Sol 6SG7 Tube Date Code DP3 Tung Sol 6SG7 Remote Cutoff Pentode

(1) Tested Admiral 6BZ6 Tube Date Code 60-17 Semi Remote Cutoff Pentode Tube

(1) Tested Automatic 12FR8 Tube Medium Mu Triode Remote Cutoff Pentode Tube

(1) Tested Magnavox 6BZ6 Tube Semi Remote Cutoff Pentode Tube

(1) Tested RCA 12BD6 Tube with Box Date Code LV RCA 12BD6 Remote Cutoff Pentode

(1) Tested GE 1T4 Tube General Electric 1T4 Remote Cutoff Pentode Tube