(!!!!!) (Best Single) EL34 Mullard UK branded CMI XF2 single halo "O" NOS 1969 (96.7ma)
(!!!!!) (Best Single) EL34 Mullard UK branded Siemens XF2 double halo "O-O" NOS 1963 (108ma)
(!!!!!) (Best Single) PCC88=7DJ8 Siemens Germany branded Pope NOS 1979 (14.2/14.5ma)
(!!!!!) (Best Value Single) EL34 Mullard UK branded Pinnacle XF2 double halo "O-O" NOS 1965 (67ma)
(!!!!!) (Recommended XF2 Pair) EL34 Mullard UK XF2 single halo "O" NOS 1970-1973 (85ma and 90.5ma)
(!!!!) (Recommended Pair) 12AX7=ECC83 Philips and Pope Holland NOS 1965-1967 (2.1/1.8ma and 1.6/2.1ma) (Highest mA and Gm)
(!!!) (Good Value Pair) 6BM8=ECL82 Mullard UK branded Philips NOS 1973-1974 (2.3ma/2.3ma and 25/28ma)
(!!!) (Single) ECL82=6BM8 Mullard UK branded Dumont NOS 1966 (2.2/31ma)
(!!!) 6GM8=ECC86 Amperex Globe Holland NOS 1968 (3.9/4.8ma)
(!!!) 6GM8=ECC86 Amperex Holland NOS 1975 faded printing (4.0/4.5ma)
(!!!) 6GM8=ECC86 POPE Valvo Hamburg Germany NOS 1974 (4.9/5.4ma)
(!!!) 6GM8=ECC86 SIEMENS HOLLAND NOS 1970 (3.9/4.4ma)
(!!) (Best Value Single) ECL82=6BM8 RCA Mexico NOS 1970's (2.1ma/28ma)
(!!) (Recommended Pair) 6DJ8 Pope and Philips Holland NOS 1967-1968 (15.8/17.4ma and 16.0/18.8ma)
(!!) (Recommended Pair) ECL86=6GW8 GE and Philips by Brimar UK NOS 1968 (1.4/1.0ma and 31/33ma)
(!!) ECL82=6BM8 RCA Mexico NOS 1970's (1.8ma/28ma)
(!!) ECL82=6BM8 RCA Mexico NOS 1970's (2.7ma/32ma) (build like Holland 6BM8)
(!) (Recommended Single) 6GM8=ECC86 SIEMENS HOLLAND NOS 1970 (4.0/5.0ma)
