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Preamp tubes

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(!!!!) (Best Pair 1974) 12AU7=ECC82 Mullard UK branded Philips ribbed plates NOS 1974 (9.8/9.4ma and 9.5/10.5ma) (Rogue, Hovland, Audio Note) (Best Pair)

(!!!!) (Best Pair 1974) 12AU7=ECC82 Mullard UK branded Philips ribbed plates NOS 1974 (9.8/9.4ma and 9.5/10.5ma) (Rogue, Hovland, Audio Note) (Best Pair)

$ 259.99
(!!!!!) (Best Pair 1974) 12AU7 Mullard Philips UK NOS 1974 (10.4/9.4ma and 10.0/9.8ma) (Rogue, Hovland, Audio Note) 1-3% matched

(!!!!!) (Best Pair 1974) 12AU7 Mullard Philips UK NOS 1974 (10.4/9.4ma and 10.0/9.8ma) (Rogue, Hovland, Audio Note) 1-3% matched

$ 289.99
(!!!) (Good Value Single) JAN-6189=12AU7WA Sylvania NOS 1960 era in white box (8.6/10ma)

(!!!) (Good Value Single) JAN-6189=12AU7WA Sylvania NOS 1960 era in white box (8.6/10ma)

$ 24.99
(!!!!) (Best Overall Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded

(!!!!) (Best Overall Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (11.2/11.7ma) 1-2% section balance (Highest mA and Gm)

$ 149.99
(!!!!) (Best Single #3) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded

(!!!!) (Best Single #3) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (12.0/10.2ma)

$ 124.99
(!!!!) (Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded

(!!!!) (Single) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.8/8.6ma)

$ 119.99
(!!!!) (Recommended Pair) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded

(!!!!) (Recommended Pair) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (9.6/8.8ma and 9.4/9.0ma) 1-2% matched

$ 199.99
(!!!!) (BEST Pair) 5963=12AU7 RCA NOS ribbed plates 1965-1973 (12.4/12.6ma and 11.4/11.6ma) (Highest mA and Gm)

(!!!!) (BEST Pair) 5963=12AU7 RCA NOS ribbed plates 1965-1973 (12.4/12.6ma and 11.4/11.6ma) (Highest mA and Gm)

$ 39.99
(!!) (BEST GE Pair) 5963=12AU7 GE branded RCA NOS ribbed plates 1978 (13.0/11.4ma and 12.6/11.4ma)

(!!) (BEST GE Pair) 5963=12AU7 GE branded RCA NOS ribbed plates 1978 (13.0/11.4ma and 12.6/11.4ma)

$ 34.99
(!!!) (Best Single 1967) ECC82=12AU7 Philips Holland NOS 1967 (11.2/10.6ma) (same Gm)

(!!!) (Best Single 1967) ECC82=12AU7 Philips Holland NOS 1967 (11.2/10.6ma) (same Gm)

$ 129.99
(!!!) (Recommended Pair) 5963 gray plates NOS 1967-1973 (9.4/9.09ma and 8.4/9.0ma)

(!!!) (Recommended Pair) 5963 gray plates NOS 1967-1973 (9.4/9.09ma and 8.4/9.0ma)

$ 34.99
(!) ECC82=12AU7 Valvo Holland used/good 75-90% 1968 (7.8/9.0ma)

(!) ECC82=12AU7 Valvo Holland used/good 75-90% 1968 (7.8/9.0ma)

$ 21.99
(!!!) (Good Value Single) 12AU7 Philips Australia NOS 1970 era (9.6/8.8ma) (same internals as Holland made)

(!!!) (Good Value Single) 12AU7 Philips Australia NOS 1970 era (9.6/8.8ma) (same internals as Holland made)

$ 44.44
(!!!!) (Best Pair #2) 12AU7 Philips Holland NOS 1971-1972 dimpled disc halo (10.2/10.6ma and 11.2/11.6ma)

(!!!!) (Best Pair #2) 12AU7 Philips Holland NOS 1971-1972 dimpled disc halo (10.2/10.6ma and 11.2/11.6ma)

$ 239.99
(!!!!) (Holland Single) 12AU7 Philips Miniwatt Holland like new 1961 large

(!!!!) (Holland Single) 12AU7 Philips Miniwatt Holland like new 1961 large "O" getter halo (9.6/11ma)

$ 99.99
(!!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS

(!!!) (Best Single) 12AU7A Tungsol tall ribbed plates NOS "O" getter halo 1960 era (10.8/11.4ma)

$ 59.99
(!!!) (BEST PRICE) 12AU7A GE used/good 1971 - 1978 (4 for $29.99)

(!!!) (BEST PRICE) 12AU7A GE used/good 1971 - 1978 (4 for $29.99)

$ 29.99
(!!!!!) (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
(!!!!) (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
(!!!) (Recommended Single) 12AU7A RCA clear top NOS 1969 (8.4/8.2ma)

(!!!) (Recommended Single) 12AU7A RCA clear top NOS 1969 (8.4/8.2ma)

$ 54.99
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