(!!!!!) (3rd Best MULLARD PAIR) EL84 Mullard Great Britain NOS same build 1965-1978 (49.8ma and 50.0ma) 1-2% matched
(!!!!!) (Best Pair) KT66 GEC UK NOS 1960's same build (85.5ma and 87.5ma)
(!!!!!) (Best Pair) KT66 GEC/Genalex UK NOS 1960's same build (80ma and 80.5ma)
(!!!!!) (slightly microphonic) 12AX7A RCA gray ribbed plates NOS 1970 era (1.1/2.3ma)
(!!!!) (Recommended Pair) 12AT7WA=CV4024 Mullard NOS wide ribbed plates like CV4024 1978 (7.2/9.5ma and 7.0/9.6ma) (Best Value)
