4E27 Gammatron used 1940's good filament
4E27 Lewis and Kaufamn NOS original boxes 1950's (3 in stock)
4E27 RCA used 1950 good filament
4PR60C=8252 Eimac PULSE TETRODE NOS
4X150A=RCA NOS 1970 sold as-is
50B5 GE branded Westinghouse NOS 1960's (75/45)
50B5 RCA branded Raytheon NOS 1950's (64/45)
50B5 RCA NOS 1958 (64/45)
50B5 RCA NOS 1962 (82/60)
50B5 RCA tilted glass NOS (66/45)
50B5 RCA tilted glass NOS (68/45)
50B5 RCA used/good 1950's (63/45)
50B5 RCA used/good 1950's (64/45)
50B5 Tungsol NOS 1956 (76/45)
50B5 used/good (1 in stock)
50EH5 GE NOS (115/60)
50EH5 GE NOS tilted glass (92/60)
50EH5 Sylvania NOS (90/60)
50EH5 US Brands NOS (5 in stock)
50L6GT Emerson by RCA used/good 1940's (91/60)
