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Preamp tubes

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(!!!) (Pair) 6FQ7 RCA clear top NOS

(!!!) (Pair) 6FQ7 RCA clear top NOS "O" getter halo 1970's (6.6/6.0ma and 6.0/6.4ma) (close Gm)

$ 89.99
(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's same build (6.4/6.8ma and 6.4/6.4ma)

(!!!) (Recommended Pair) 6FQ7 Sylvania NOS 1970's same build (6.4/6.8ma and 6.4/6.4ma)

$ 47.99
(!!!) (Recommended Pair) 6J6A Sylvania NOS

(!!!) (Recommended Pair) 6J6A Sylvania NOS

$ 12.99
(!!!) (Pair) UX-226 RCA Radiotron balloon used/good 1930 era (3.9ma and 3.6ma)

(!!!) (Pair) UX-226 RCA Radiotron balloon used/good 1930 era (3.9ma and 3.6ma)

$ 35.99
(!!!) (Recommended Pair) JLRV-6J6WA GE Canada NOS 1960's (6.4/6.6ma and 6.6/6.5ma)

(!!!) (Recommended Pair) JLRV-6J6WA GE Canada NOS 1960's (6.4/6.6ma and 6.6/6.5ma)

$ 12.99
(!!!) (Recommended Single) 127 Arcturus Blue Balloon used/good 1930 era in white box (4.3ma)

(!!!) (Recommended Single) 127 Arcturus Blue Balloon used/good 1930 era in white box (4.3ma)

$ 44.99
(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (7ma/11ma) (recommended for mic)

(!!!) (Recommended Single) 12AT7 Fisher Telefunken Germany <> bottom NOS 1964 (7ma/11ma) (recommended for mic)

$ 89.99
(!!!) (Recommended Single) 12AT7=ECC81 Siemens Halske Germany NOS 1960 (10.3ma/11ma)

(!!!) (Recommended Single) 12AT7=ECC81 Siemens Halske Germany NOS 1960 (10.3ma/11ma)

$ 59.99
(!!!) (Recommended Single) 12AU7A GE NOS 1963 (8.6/9.5ma)

(!!!) (Recommended Single) 12AU7A GE NOS 1963 (8.6/9.5ma)

$ 24.99
(!!!) (Best Pair #1) 12AU7A RCA clear top NOS 1960's (10.2/11.6ma)

(!!!) (Best Pair #1) 12AU7A RCA clear top NOS 1960's (10.2/11.6ma)

$ 69.99
(!!!) (Recommended Single) 12BZ7 RCA gray plates branded Tungsol NOS 1960's (2.0/2.1ma) 1-2% section balance

(!!!) (Recommended Single) 12BZ7 RCA gray plates branded Tungsol NOS 1960's (2.0/2.1ma) 1-2% section balance

$ 24.99
(!!!) (Best Single #2) 5814A=12AU7 GE

(!!!) (Best Single #2) 5814A=12AU7 GE "5 STAR" with "O" getter halo 1967 (10.6/10.2ma) (Same Gm) 1-2% section balance

$ 44.44
*** SPAIN 2.24.25 (!!!) (Recommended Single) 6922=E88CC Tesla Czech Republic NOS 1972 (10.8/11.5ma)

*** SPAIN 2.24.25 (!!!) (Recommended Single) 6922=E88CC Tesla Czech Republic NOS 1972 (10.8/11.5ma)

$ 99.99
(!!!) (Recommended Single) 6BX7GT GE

(!!!) (Recommended Single) 6BX7GT GE "O" getter gray plates 1963 (71/76ma)

$ 18.99
(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse

(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse "O" getter gray plates 1960's (43/48ma)

$ 18.99
(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse black plates NOS

(!!!) (Recommended Single) 6BX7GT GE branded Westinghouse black plates NOS "O" getter 1962 (71/79ma)

$ 21.99
(!!!) (Recommended Single) CV5358=6DJ8 Mullard UK used/good 1969 some stains on glass (17.2/17.8ma) (High Ma and Gm)

(!!!) (Recommended Single) CV5358=6DJ8 Mullard UK used/good 1969 some stains on glass (17.2/17.8ma) (High Ma and Gm)

$ 39.99
(!!!) (Best Pair #3) E80CC=6085 Philips SQ and RTC Holland NOS 1967-1971 (5.8/6.9ma and 5.6/7.0ma) (Same Gm)

(!!!) (Best Pair #3) E80CC=6085 Philips SQ and RTC Holland NOS 1967-1971 (5.8/6.9ma and 5.6/7.0ma) (Same Gm)

$ 209.99
(!!!) (Best Value Single) ECL82=6BM8 Pope Holland NOS 1969 made in Hendon Works Australia plant (2.0/28ma)

(!!!) (Best Value Single) ECL82=6BM8 Pope Holland NOS 1969 made in Hendon Works Australia plant (2.0/28ma)

$ 52.99
(!!!) (Recommended Single) EF94=6AU6 Tungsol used/tests like new 1957 (10ma)

(!!!) (Recommended Single) EF94=6AU6 Tungsol used/tests like new 1957 (10ma)

$ 7.99
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