(!!!!) (Best Single) EZ81=6CA4 Philips Australia NOS 1974 (58/40 and 58/40) (similar sound to EZ81 Holland) 1% section balance
(!!) (Recommended Pair) 6GK5=6FQ5A GE NOS 1968-1981 (10.4ma and 11.2ma)
(!) (BEST OVERALL PAIR) 6AV6 Super Radiotron Australia NOS 1960's (1.6ma and 1.7ma) (same Gm)
6DQ6A Super Radiotron Australia NOS (69ma)
6DQ6B GE Amperex NOS 1972 (84ma)
6DQ6B GE Amperex NOS 1972 (94ma)
6DQ6B GE branded Amperex NOS/77% 1970 (58ma)
6DQ6B JAPAN NOS 1960's (64.5ma)
