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4 pin ceramic chassis mount sockets with gold plated terminals for 2A3, 300B, 45, 50, 811A (UX-4 base) (0 in stock)
4 Pin CERAMIC CHASSIS SOCKET for 5D21 / 705A / 715A/B like new (1 in stock)
4 Pin CERAMIC CHASSIS SOCKET for 5D21 / 705A / 715A/B NOS (0 in stock)
4 Pin EF Johnson (123-209-200) NOS for 811A / 572B / 866A (1 in stock)
4 Pin EF Johnson (123-210-200) NOS for 811A / 572B / 866A / 8020W
4 Pin EF Johnson (123-211-200) BAYONET SOCKET used (for 211/805/810/845) (0 in stock)
4 Pin USA-MADE slim profile BAYONET SOCKET NOS (for 211/805/810/845) (6 in stock)
4-125A=4D21 Eimac used sold as-is good filament
4-125A=GL-4D21 GE NOS original box 1960 sold as-is
4-250A=5D22 RCA 1962 used original box sold as-is 1962 (good filament)
4-400A=8438 Eimac
4-65A RCA NOS 1955
4-65A=8165
4-Pin EF Johnson (122-224-1) ceramic wafer socket NOS (UX-4) (0 in stock) (300B, 10Y, 2A3, 45, 50, 26) (Best ever made)
4-Pin EF Johnson (122-244-1) ceramic wafer socket NOS (0 in stock)
4-pin EF Johnson 123-206-1 = 123-206-200 Jumbo ceramic bayonet socket for 8008, 5C22, C6J vacuum tubes NOS (0 in stock)
4-S Majestic ballast NOS
40 NOS
40 RCA NOS (2 in stock)
40/475V, 10/475V, 4/500V, 40/300VDC Cornell Dubilier FP cap NOS (D0842) (2 sections 475 volts)
