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Preamp tubes

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(!!) (Single) JAN-5755 Raytheon Black Plates NOS 1967 (1.6/2.0ma)

(!!) (Single) JAN-5755 Raytheon Black Plates NOS 1967 (1.6/2.0ma)

$ 15.99
(!!) JAN-CRP-5687WA Raytheon black plates

(!!) JAN-CRP-5687WA Raytheon black plates "O" getter halo 1962 used/tests like new (44.5/39ma)

$ 39.99
(!!) (Recommended Sylvania) 6EU7 Sylvania branded RCA NOS 1970's (68/32 and 76/32)

(!!) (Recommended Sylvania) 6EU7 Sylvania branded RCA NOS 1970's (68/32 and 76/32)

$ 39.99
(!!!!) (Best Pair) 6BL7GT GE

(!!!!) (Best Pair) 6BL7GT GE "D" getter NOS 1957 same build (34/36ma and 37/32ma)

$ 26.99
(!!) (slightly microphonic single) 12BZ7 RCA gray plates NOS 1966 (2.3/3.0ma)

(!!) (slightly microphonic single) 12BZ7 RCA gray plates NOS 1966 (2.3/3.0ma)

$ 19.99
(!!) (Slightly microphonic single) 6SN7GT Brimar UK NOS slightly microphonic 1960 era (6.8/7.8ma)

(!!) (Slightly microphonic single) 6SN7GT Brimar UK NOS slightly microphonic 1960 era (6.8/7.8ma)

$ 199.99
(!!) (slightly microphonic) 12AU7A Raytheon black ribbed plates

(!!) (slightly microphonic) 12AU7A Raytheon black ribbed plates "D" getter halo black coated glass 1951 (8.8/9.6ma)

$ 39.99
5963 RCA black ribbed plates

5963 RCA black ribbed plates" and D getter halo NOS 1957 (sold out - read review)

$ 0.00
(!!) (slightly microphonic) 6SL7GT RCA NOS 1950 (2.2/2.3ma) 1-2% section balance

(!!) (slightly microphonic) 6SL7GT RCA NOS 1950 (2.2/2.3ma) 1-2% section balance

$ 32.99
(!!) (slightly microphonic) 6SL7GT RCA NOS black plates gray coated glass 1952 (2.8/2.8ma) 1% section balance

(!!) (slightly microphonic) 6SL7GT RCA NOS black plates gray coated glass 1952 (2.8/2.8ma) 1% section balance

$ 32.99
(!!) (slightly microphonic) JHS-12AT7 Sylvania black plate

(!!) (slightly microphonic) JHS-12AT7 Sylvania black plate "D" getter 1953 (11.2ma/11.2ma) 1% section balance

$ 29.99
(!!) (~ Best Value Pair ~) 56 Sylvania test like new 1940's (5.3ma and 5.5ma)

(!!) (~ Best Value Pair ~) 56 Sylvania test like new 1940's (5.3ma and 5.5ma)

$ 19.99
(!!) (~ Best Value ~) 12AT7 Toshiba JAPAN black plates rebranded CM Curtis Mathes NOS 1960's copper grid posts (9.0/9.2ma)

(!!) (~ Best Value ~) 12AT7 Toshiba JAPAN black plates rebranded CM Curtis Mathes NOS 1960's copper grid posts (9.0/9.2ma)

$ 22.99
(!!!!) (Recommended Pair) 5842=417A Amperex

(!!!!) (Recommended Pair) 5842=417A Amperex "PQ" USA Nickel Pins "O" getter halo NOS 1985 (35ma and 37ma)

$ 79.99
(!!) (~ Recommended Pair ~) 6JD6 GE branded RCA NOS same date codes (13ma and 14ma)

(!!) (~ Recommended Pair ~) 6JD6 GE branded RCA NOS same date codes (13ma and 14ma)

$ 8.99
(!!) (Recommended Single) 12BZ7 RCA gray plates NOS 1968 mica slightly tilted (2.1/2.2ma) (High Gm)

(!!) (Recommended Single) 12BZ7 RCA gray plates NOS 1968 mica slightly tilted (2.1/2.2ma) (High Gm)

$ 24.99
(!!) 12AT7 Brimar black plates NOS/70-75% 1955 (5.6/5.8ma)

(!!) 12AT7 Brimar black plates NOS/70-75% 1955 (5.6/5.8ma)

$ 19.99
(!!) (slightly microphonic) B309=12AT7 GEC UK black plates

(!!) (slightly microphonic) B309=12AT7 GEC UK black plates "D" getter NOS 1950's (9.6/10.8ma)

$ 129.99
(!!!) (Best SIngle 1950's) 12AT7 Brimar UK black plates

(!!!) (Best SIngle 1950's) 12AT7 Brimar UK black plates "O" getter halo NOS late 1950's (11.6/12.8ma)

$ 89.99
(!!) 12AT7 Knight by Mullard NOS 1966 (8.8/9.4ma)

(!!) 12AT7 Knight by Mullard NOS 1966 (8.8/9.4ma)

$ 59.99
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