(!!!) (Best Single) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1961 (Premium 6BL8 SUB) (Highest mA and Gm)
(!) E80CF Valvo Germany rebranded Philips Miniwatt SQ "PINCHED WAIST" NOS 1961 (6BL8 substitute)
(!) E80CF Valvo Germany rebranded Philips Miniwatt SQ "PINCHED WAIST" NOS 1962 (6BL8 substitute)
(!!!!) (Best Value Pair) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1966 (12.2/12.6ma and 8.5/8.5ma) (6BL8 SUB)
7643 Valvo branded Amperex PQ Germany "PINCHED WAIST" NOS 1960 (6BL8 sub)
(!!!!!) (Best Pair 1961) E80CF=7643 Valvo branded Amperex Germany PQ NOS 1961 (10.2/10.8ma and 10.4/10ma) (PREMIUM 6BL8 SUB) (Tuners)
E80CF Telefunken Germany <> bottom NOS Gold Pins rebranded Siemens 1970-1971 (6BL8 sub)
(!!!) (Best Value Pair) E80CF=7643 Valvo Germany branded International NOS 1962-1963 (PREMIUM 6BL8 SUB) (Tuners) 1-5% matched
(!!!) (Best Value Pair) E80CF=7643 Valvo Germany branded International NOS 1961-1963 (PREMIUM 6BL8 SUB) (Tuners) 1-5% matched
(!!!) (Best Value Single) E80CF=7643 Valvo Germany branded International NOS 1961 (12.8/18mA) (PREMIUM 6BL8 SUB) (Tuners)
(!!!) (Best Value Single) E80CF=7643 Valvo Germany branded International NOS 1963 (12.8/18mA) (PREMIUM 6BL8 SUB) (Tuners)
E80CF=7643 Valvo Germany branded Philips 1970 (10.5/14.2ma)
