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Preamp tubes

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(!!!) (Best Single) 6SN7GT Tungsol parallel gray plates NOS 1953 burgundy base double large

(!!!) (Best Single) 6SN7GT Tungsol parallel gray plates NOS 1953 burgundy base double large "O" mica (9/10ma) (rare)

$ 99.99
(!!!) (Good Value Single) 6SN7GT Tungsol parallel gray plates NOS 1952 double large

(!!!) (Good Value Single) 6SN7GT Tungsol parallel gray plates NOS 1952 double large "O" mica (8.6/7.0ma) (rare)

$ 59.99
(!!!) (Best Single) 2C51=5670 Sylvania NOS 1970's (8.8/8.4ma)

(!!!) (Best Single) 2C51=5670 Sylvania NOS 1970's (8.8/8.4ma)

$ 34.99
(!!!) (Single) JHS-5670 Sylvania NOS 1966 (7.0/6.8ma)

(!!!) (Single) JHS-5670 Sylvania NOS 1966 (7.0/6.8ma)

$ 29.99
(!!!) (Best Value Single) 12DW7=7247 Magnovox Mullard UK used/good 1963 (0.9ma/13.6ma)

(!!!) (Best Value Single) 12DW7=7247 Magnovox Mullard UK used/good 1963 (0.9ma/13.6ma)

$ 44.99
(!!!!) (Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)

(!!!!) (Best Pair) JHY-6AK5 Hytron black plate NOS 1952 (8.9ma and 9.3ma)

$ 27.99
(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma) (strong Gm)

(!!!!!) (Nice Single) ECC82=12AU7 Telefunken Germany <> bottom ribbed plates used/good 1957 (8.5/8.2ma) (strong Gm)

$ 99.99
112A RCA used/tests like new 1930's (7.5ma)

112A RCA used/tests like new 1930's (7.5ma)

$ 29.99
(!!) (PAIR) 6AV6 Sylvania and Sylvania branded Executone NOS 1960's (1.0ma and 1.0ma)

(!!) (PAIR) 6AV6 Sylvania and Sylvania branded Executone NOS 1960's (1.0ma and 1.0ma)

$ 11.99
5840=EF732 GE NOS 1953 (5.3ma) (Soundelux, Peluso, Brauner)

5840=EF732 GE NOS 1953 (5.3ma) (Soundelux, Peluso, Brauner)

$ 0.00
(!!!!) (Recommended Single 1959) 12AU7 Mullard Heath UK long plates

(!!!!) (Recommended Single 1959) 12AU7 Mullard Heath UK long plates "O" getter used/good 1959 (8.8/9.0ma)

$ 169.99
(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)

(!!!!) (Best Pair) 201A Silvertone Balloon NOS and like new 1930 era (4.2ma and 5.0ma) (Highest mA and Gm)

$ 99.99
(!!!!) (Best Raytheon Pair) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.8ma and 1.9/1.7ma)

(!!!!) (Best Raytheon Pair) JAN-5755 Raytheon Black Plates NOS 1979 (1.7/1.8ma and 1.9/1.7ma)

$ 29.99
(!!!!) (Best Pair #2) JAN-5755 Raytheon Black Plates NOS 1973 (1.6/1.7ma and 1.7/1.8ma) (High Gm)

(!!!!) (Best Pair #2) JAN-5755 Raytheon Black Plates NOS 1973 (1.6/1.7ma and 1.7/1.8ma) (High Gm)

$ 29.99
(!!!!) (Best Overall Pair) JAN-5755 Raytheon Black Plates NOS 1973-1979 (1.9/2.0ma and 1.9/1.9ma) (Highest mA and Gm) 1-2% matched

(!!!!) (Best Overall Pair) JAN-5755 Raytheon Black Plates NOS 1973-1979 (1.9/2.0ma and 1.9/1.9ma) (Highest mA and Gm) 1-2% matched

$ 39.99
(!!!!) (Recommended Pair) JAN-5755 Raytheon Black Plates NOS 1971-1979 (1.5/1.7ma and 1.5/1.8ma)

(!!!!) (Recommended Pair) JAN-5755 Raytheon Black Plates NOS 1971-1979 (1.5/1.7ma and 1.5/1.8ma)

$ 27.99
(!!!) (Best Value Pair) 12AT7=ECC81 RFT East Germany NOS 1970's (10.0/9.6ma and 10.4/9.6ma) 1-2% matched

(!!!) (Best Value Pair) 12AT7=ECC81 RFT East Germany NOS 1970's (10.0/9.6ma and 10.4/9.6ma) 1-2% matched

$ 59.99
6AB7Y=1853 RCA NOS (6 in stock)

6AB7Y=1853 RCA NOS (6 in stock)

$ 5.99
6AB7 CBS NOS (3 in stock)

6AB7 CBS NOS (3 in stock)

$ 5.99
6AB7 Sylvania NOS (2 in stock)

6AB7 Sylvania NOS (2 in stock)

$ 5.99
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