NO SHORTS OR LEAKS DETECTED. MIN = 40-40.
1953 RCA 5R4GY VINTAGE RECTIFIER TUBE - BLACK PLT D GTR - TEST STRONG- 274B SUB
RCA JRC 12AU7 VINTAGE MILITARY ISSUE TUBE - 1952 - BLACK PLATE D GETTER
One WESTINGHOUSE 6C4 Tube NOS NIB Grey Plate D Getter Test[%]: 122 TV-7
Strong Western Electric Black Plate D Getter 407A Tube
Strong NOS Western Electric Black Plate D Getter 407A Tube
One SILVERTONE 6AB4 Tube NIB NOS Black Plate D Getter AMPLITREX Results
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