(!!!) (Best Overall Single) E90F=6BH6 Philips SQ Holland NOS 1968 (8.4ma)
$15.99
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E90F=6BH6 Philips SQ Holland NOS 1968 8.4ma Gm=4900 Tested on Amplitrex Good Ma = 6.5-7.5ma Good Gm = 4000-4500 (best tube for a Marantz 8B)
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