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(Best Single) 6EB8 RCA NOS 1960's
(Best Single) 6KT8 US Brands NOS (7/16) (highest testing single)
(Best Single) 6SF5 GE NOS 1958 (2.1ma) (strong single)
(BEST SINGLE) 6SF5GT Tungsol NOS 1940's (1.1ma Gm=1500)
(Best Single) E130L=7534 Amperex by Valvo Germany NOS 1962 in Amperex box (102ma)
(Best Value Pair) 2050A GE coin-base NOS 1970's (BEST PRICE)
(Best Value Pair) 50L6GT GE coin base NOS 1983 (92/60 and 95/60)
(Best Value) 6GV8=ECL85 RCA Mexico NOS (2 in stock)
(BEST VALUE) 6LQ6 Sylvania branded RCA low hours/like new 1970 era (104ma)
(BEST) 14R7 RCA Victor NOS 1940's (98/60)
(Best) 1U4 Tungsol NOS 1953 (1 in stock)
(DISPLAY TUBE - DOES NOT WORK) 838 RCA Radiotron around 1940 (DISPLAY TUBE WITH OPEN FILAMENT)
(DISPLAY TUBE) 350B Western Electric used 1967 (display tube - defective)
(display tube) UV-99 Radiotron brass base 1920's - lights up but does not have emission
(display tube) UV-99 Radiotron brass base 1920's tarnished base - lights up
(display tube) UV-99 Unknown maker - does not work
(PAIR) 0D3A Russian rebranded GE Holland NOS 1980 (1 pair)
(PAIR) 12AX4GTA RCA NOS 1960 era (1 pair)
(PAIR) 12BD6 RCA NOS (85-90/60)
(PAIR) 12BD6 Sylvania NOS 1952 (72/60 and 72/60)
