(!!!!!) (Best Single) JAN-5998 Tungsol black plates top and side getter NOS 1966 (91ma and 87ma) (Close Gm)
(!!!!) (Recommended PAIR) 5998A Sylvania JAN NOS 1980 (144/131ma and 138/144ma) (5998A=7236) (Copy)
(!!!) (BEST PAIR) 5998A Sylvania JAN NOS 1980 (121/123ma and 122/126ma) (5998A=7236) 1-3% matched
(!!!) (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 (136/132ma and 134/132ma) (5998A=7236)
(!!!) (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 Single) 5998A Sylvania JAN NOS 1980 (115/111mA)
(!!!) (Recommended Single) 5998A Sylvania JAN NOS 1980 (124/130mA)
421A Western Electric (sold out)
421A Western Electric NOS 1984 (sold - read review)
