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(!!!!) (Set of 10) 5842Q Raytheon NOS 1983 (10 tubes for $279.99) (all test between 19ma-24ma
(!!!) (Recommended Pair) JAN-5814A Philips by Sylvania NOS 1987 (9.4/8.8ma and 9.4/8.2ma) 1-3% matched
(Henry Sennett pair) JAN-5842WA Raytheon NOS 1984-1985
7581 Tungsol brown base used/75% 1964 (52.5ma)
7581A GE branded RCA used/good 1973 (56ma)
7581A GE used/good 1974 (59ma)