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Preamp tubes

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(!!!) (Best Pair #3) 56 Sylvania black plate NOS 1940's branded Western Electronics 1946 slightly tilted glass (5.5ma and 5.6ma) (same Gm)

(!!!) (Best Pair #3) 56 Sylvania black plate NOS 1940's branded Western Electronics 1946 slightly tilted glass (5.5ma and 5.6ma) (same Gm)

$ 29.99
(!!!!!) (Best Single 1959) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates NOS 1959 (1.1/1.0ma and Gm=1700/1600) 1-3% section balance

(!!!!!) (Best Single 1959) ECC83=12AX7 Telefunken Germany <> bottom ribbed plates NOS 1959 (1.1/1.0ma and Gm=1700/1600) 1-3% section balance

$ 349.99
(!!!!!) (Best Single #3) ECC83=12AX7 Telefunken Germany ribbed plates used/tests like new 1953-1955 (1.3/1.1ma and Gm=1700/1600) 1-5% section balance

(!!!!!) (Best Single #3) ECC83=12AX7 Telefunken Germany ribbed plates used/tests like new 1953-1955 (1.3/1.1ma and Gm=1700/1600) 1-5% section balance

$ 229.99
(!!) (Single) 6SN7GTB RCA NOS 1958 tilted glass (8.8/9.2ma) (Gm the same)

(!!) (Single) 6SN7GTB RCA NOS 1958 tilted glass (8.8/9.2ma) (Gm the same)

$ 59.99
(!!!!) (Best Single #3) 6SN7GTB RCA branded Wards Super Airline NOS 1959 (9.0/9.2ma)

(!!!!) (Best Single #3) 6SN7GTB RCA branded Wards Super Airline NOS 1959 (9.0/9.2ma)

$ 64.99
(!!!!) (Best Pair #2) 6SN7GTB RCA NOS 1960-1961 (9.6/10ma and 8.5/9.3ma) (smooth, rich and textured)

(!!!!) (Best Pair #2) 6SN7GTB RCA NOS 1960-1961 (9.6/10ma and 8.5/9.3ma) (smooth, rich and textured)

$ 144.44
(!!!!) (Best Value Single) 6SN7GTB RCA NOS 1964 (8.4/7.2ma)

(!!!!) (Best Value Single) 6SN7GTB RCA NOS 1964 (8.4/7.2ma)

$ 54.99
(!) (Pair) 12AU6 RCA NOS 1973 (10.6ma and 10.0ma)

(!) (Pair) 12AU6 RCA NOS 1973 (10.6ma and 10.0ma)

$ 13.99
(!) (Pair) 12AU6 RCA NOS 1973 (9.2ma and 9.2ma) 1-2% matched

(!) (Pair) 12AU6 RCA NOS 1973 (9.2ma and 9.2ma) 1-2% matched

$ 13.99
(!!!) (Recommended Pair) 12AT7 GE gray plate NOS 1961 (12.0/13.4ma and 13.2/12.5ma)

(!!!) (Recommended Pair) 12AT7 GE gray plate NOS 1961 (12.0/13.4ma and 13.2/12.5ma)

$ 54.99
(!!) (Single) 201A=UV-201-A Supertron Hoboken New Jersey NOS 1926 (2.5ma) (good Gm)

(!!) (Single) 201A=UV-201-A Supertron Hoboken New Jersey NOS 1926 (2.5ma) (good Gm)

$ 59.99
(!!!!) (Best Single #1) ECC802S=12AU7 Telefunken Germany <> bottom NOS 1960 good printing (11.0ma and 10.6ma) (Same Gm)

(!!!!) (Best Single #1) ECC802S=12AU7 Telefunken Germany <> bottom NOS 1960 good printing (11.0ma and 10.6ma) (Same Gm)

$ 798.88
(!) 6BE6 Sylvania NOS (1.4ma)

(!) 6BE6 Sylvania NOS (1.4ma)

$ 6.99
(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates used/good 1960 era (1.0ma and 7.8ma)

(!!) 7247=12DW7 GE branded Tungsol tall gray ribbed plates used/good 1960 era (1.0ma and 7.8ma)

$ 29.99
(!!) (Single) ECF82=6U8 Toshiba Japan branded Telefunken NOS 1964 (14.2ma triode and 9ma pentode)

(!!) (Single) ECF82=6U8 Toshiba Japan branded Telefunken NOS 1964 (14.2ma triode and 9ma pentode)

$ 29.99
(!!) 7247=12DW7 GE branded RCA tall gray ribbed plates low hours/tests like new 1961 (1.3ma and 9.2ma)

(!!) 7247=12DW7 GE branded RCA tall gray ribbed plates low hours/tests like new 1961 (1.3ma and 9.2ma)

$ 39.99
(!!) (slightly microphonic) 12AX7 Sylvania Zenith black ribbed plates

(!!) (slightly microphonic) 12AX7 Sylvania Zenith black ribbed plates "D" getter NOS/80% 1953 (Gm=1300/1400 and 0.9/1.0ma)

$ 69.99
(!!!!) (Best Value Pair) GL-6072 GE and GE LEAR LEAR 5 star triple mica black plates

(!!!!) (Best Value Pair) GL-6072 GE and GE LEAR LEAR 5 star triple mica black plates "D" getter halo 1953-1954 used/tests like new faded printing (2.6/2.5ma and 2.6/2.5ma) (Same Gm) (V1 guitar amp, mics, Audio Note) 1-2% matched

$ 279.99
(!!!!!) (Best Value Single 1953) GL-6072 GE 5 star triple mica black plates

(!!!!!) (Best Value Single 1953) GL-6072 GE 5 star triple mica black plates "D" getter halo 1953 used/tests like new (3.2/2.4ma) (V1 guitar amp, mics, Audio Note)

$ 138.88
(!) (SINGLE) 6BM8=ECL82 Mullard UK used/good 1959 (1.9ma/29ma)

(!) (SINGLE) 6BM8=ECL82 Mullard UK used/good 1959 (1.9ma/29ma)

$ 44.99
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