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(!!!!) (Best CV4003 Quad) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded

(!!!!) (Best CV4003 Quad) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.4/9.0, 8.4/9.0, 8.4/8.8, 8.4/8.8mA)

$ 399.99
(!!!!) (Best Overall Quad) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded

(!!!!) (Best Overall Quad) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.8/8.8, 8.8/8.8, 8.6/8.8, 8.6/9.0mA)

$ 399.99
(!!!!) (Best Quad #1) 6SH7 GE metal can NOS 1976 (10.6, 10.6, 11.0, 11.0mA)

(!!!!) (Best Quad #1) 6SH7 GE metal can NOS 1976 (10.6, 10.6, 11.0, 11.0mA)

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

(!!!!) (Best Quad) CV4003=12AU7=6189 Mullard UK NOS 1978 rebranded "6189 RTC" 1981 (8.8/9.5, 8.8/9.4, 9.0/9.3, 9.0/9.4mA) (Highest Gm 1-2% matched)

$ 399.99
(!!) (1 set of 10) 6SH7 GE metal can NOS (10 tubes for $34.99)

(!!) (1 set of 10) 6SH7 GE metal can NOS (10 tubes for $34.99)

$ 34.99
(!!) (Best Value Quad) 6SH7 GE metal can NOS 1976 (8.6, 9, 9, 9mA)

(!!) (Best Value Quad) 6SH7 GE metal can NOS 1976 (8.6, 9, 9, 9mA)

$ 22.99
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