(!!!) (Best Mullard Single) ECF80=6BL8 IEC Mullard UK NOS 1966 (16ma/12ma) (Highest mA and Gm)
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1964-1965 (11.4ma and 11.8ma)
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (10.8ma and 11.2ma) 1-3% matched
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (11.2ma and 11.6ma) 1-3% matched
(!!!) (BEST PAIR) EF184 Mullard branded Philips NOS 1965 (12.0ma and 12.4ma)
(!!!) (PAIR) EF184 Mullard branded Philips NOS 1964-1965 (8.0ma and 8.2ma) 1-3% matched
(!!) EF184 Siemens Germany NOS 1967 (7ma)
(!!) EF184 Siemens Halske branded Zenith Germany NOS 1969 (9.4ma)
(!!) EF184=6EJ7 Mullard UK in Kradlepack box 1969 (9.7ma)
(!) (SINGLE) EF184 Philips Mullard UK NOS 1965 (11.5ma)
(!) (SINGLE) EF184 Philips Mullard UK NOS 1965 (12.2ma)
(!) (SINGLE) EF184 Philips Mullard UK NOS 1965 (15.2ma)
(!) (SINGLE) EF184 Philips Mullard UK NOS 1965 (15.6ma)
(!) (SINGLE) EF184 RCA Holland NOS 1962 (10ma)
(!) (SINGLE) EF184 RCA Holland NOS 1962 (9ma)
6EJ7 GE NOS (7.3ma)
6EJ7 RCA by Siemens Germany NOS 1971 (10ma)
6EJ7 RCA by Siemens Germany NOS 1972 (12.4ma)
6EJ7 RCA East Germany NOS 1970's (13.5ma)
6EJ7 Sylvania NOS (10.2ma)
