TUNG-SOL TYPE 30 VT-27 TUBE.
Item Tag: Type 30
Early RCA Matched Pair Radiotron Type 30 VT-27 4 Pin Tubes 539C Test NOS NIB🅾️
Early RCA Matched Pair Radiotron Type 30 VT-27 539C Tested NOS NIB Triode D Getter Tubes. Closely matched for both GM & MA. Matching date codes also. Mutual Conductance (GM)Test: 32.9 & 36.3 ( 29 = NOS AVERAGE & 19 = Good MINIMUM).