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(!!!!!) (Best Overall) EZ81 Miniwatt Import by Mullard Blackburn UK "D" getter NOS 1960 (56/40 and 57/40) 1-2% section balance
(!!!!!) (Best Value Single) EZ81 Philips Miniwatt by Mullard Blackburn UK "D" getter low hours/tests like new 1962 (56/40 and 56/40) 1% section balance
(!!!!!) (Best Value Single) EZ81 Philips Miniwatt by Mullard Blackburn UK "D" getter used/tests like new 1962 (58/40 and 58/40) 1% section balance
(!!!!!) (Best Value) EZ81 Philips Miniwatt by Mullard Blackburn UK "O" getter used/tests like new 1965 (58/40 and 58/40) 1% section balance
(!!!!) (Best Overall Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49/40 and 49/40 x 2 tubes) 1% matched
(!!!!) (Best Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49/40 and 50/40 x 2 tubes) 1% matched
(!!!!) (Best Quad) EZ81=6CA4 RFT East Germany (Funkwerk) NOS 1970's (1 quad)
(!!!!) (Best Single) EZ81 Mullard Blackburn UK "D" getter NOS 1963 (57/40 and 57/40) 1% section balance
(!!!!) (Best Single) EZ81=6CA4 Philips Australia NOS 1974 (58/40 and 58/40) (similar sound to EZ81 Holland) 1% section balance
(!!!!) (Best Value Single) EZ81 GE Mullard Blackburn UK NOS 1966 (57/40 and 60/40)
(!!!!) (Best Value Single) EZ81 Mullard Blackburn UK "O" getter like new 1964 (56/40 and 57/40) 1-2% section balance
(!!!!) (Best Value Single) EZ81 Mullard Blackburn UK branded Pope Holland "D" getter used/strong 1963 (56/40 and 57/40)
(!!!!) (Best Value Single) EZ81 Mullard Blackburn UK branded VALVO like new 1964 (57/40 and 58/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (48-48/40 and 49-49/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (47-48/40 and 48-48/40)
(!!!!) (Recommended Pair) 6CA4 RFT East Germany (Funkwerk) NOS 1970's (49-49/40 and 48-49/40)
(!!!) (BEST PAIR) 6CA4 RCA NOS 1969-1970's (52/40 and 53/40 x 2 tubes)
(!!!) (BEST RCA SINGLE) 6CA4 RCA NOS 1963 (53/40 and 54/40)
(!!!) (BEST Single 1964) EZ81 Mullard UK rebranded Philips Miniwatt NOS 1964 (56/40 and 56/40) 1% section balance
(!!!) (BEST SINGLE) 6CA4=EZ81 GE NOS 1970 (55/40 and 55/40) 1% section balance
