(!!!!!) (Best Pair) 6189W Sylvania NOS 1981 (9/10.2ma and 10/9ma) 1-3% matched (same Gm)
$69.99
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1 low noise pair) JAN-6189W Sylvania NOS 1981 1 tube) 9/10.2ma Gm=2100/2200 1 tube) 10/9ma Gm=2200/2100 Matched on Amplitrex Good Ma range 8-10ma Good Gm range 1800-2200 - 6189 W is sub for a 12AU7 or 5814
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