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3LF4 Sylvania used/good (82/60)
3Q4 US Brands NOS (8 in stock)
3Q5GT Ken Rad NOS 1940's (1 in stock)
3Q5GT Philco used/tests like new 1940's (96/60)
3Q5GT Tungsol NOS (101/60)
3Q5GT=VT-221 Ken Rad used/tests like new 1940's (106/60)
3Q5GT=VT-221 Tungsol used/tests like new 1940's (105/60)
3S4 GE used/good 1960 era (99/60)
3S4 Philco and Raytheon NOS same build 1940's - 1951 (1 Pair)
3S4 RCA branded CBS NOS 1961 (98/60)
3S4 RCA Fordom used/good 1950's (100/60)
3S4 RCA NOS 1951 (100/60)
3S4 Tungsol NOS 1944 (101/60)
3S4 Tungsol NOS 1948 (102/60)
3TF4 Amperite Ballast NOS (2 in stock)
3TK2 Amperite Ballast NOS (1 in stock)
3V4 Amperite Ballast NOS (2 in stock)
3V4 GE Motorola used/strong 1960 era (92/60)
4 pin (UX-4) Amphenol brown micanol chassis socket with "metal wavy washer" NOS 1950's nickel plated contacts (0 in stock)
4 pin ceramic chassis mount sockets for 2A3, 300B, 45, 50, 811A (UX-4 base) (0 in stock)
