(!!!!!) (Recommended Single) 421A Western Electric NOS 1969 (85ma and 75ma)
(!!!!!) (Recommended Single) 421A=5998 Western Electric NOS 1984 (81ma and 94ma)
(!!!!) (2nd Best Single) JAN-5998 Tungsol black plates top and side getter NOS 1966 (88ma and 101ma)
(!!!!) (2nd Best Single) JAN-5998 Tungsol black plates top and side getter NOS 1966 (91ma and 103ma)
(!!!!) (Best Overall Single) JAN-5998 Tungsol black plates top and side getter NOS 1966 (124ma and 119ma) (Close Gm)
(!!!!) (Recommended Single) JAN-5998 Tungsol black plates top and side getter NOS 1966 (91ma and 87ma) (Close Gm)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (122/127ma and 123/126ma) (5998A=7236)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (124/126ma and 126/122ma) (5998A=7236)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (128/130ma and 125/127ma) (5998A=7236) 1-2% matched
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (136/132ma and 134/132ma) (5998A=7236)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (137/149ma and 137/149ma) (5998A=7236) 1% matched
(!!!) (Best Single) 5998A Sylvania JAN NOS 1980 (130/134mA)
(!!!) (Best Single) 5998A Sylvania JAN NOS 1980 (135/139mA)
(!!!) (Best Single) 5998A Sylvania JAN NOS 1980 (141/137mA)
(!!!) (Best Single) 5998A Sylvania JAN NOS 1980 (143/141mA)
(!!!) (Recommended PAIR) 5998A Sylvania JAN NOS 1980 (115/122ma and 117/130ma) (5998A=7236)
(!!!) (Recommended PAIR) 5998A Sylvania JAN NOS 1980 (121/123ma and 122/126ma) (5998A=7236)
(!!!) (Recommended Single) 5998A Sylvania JAN NOS 1980 (115/111mA)
(!!!) (Recommended Single) 5998A Sylvania JAN NOS 1980 (124/130mA)
421A Western Electric (sold out)