(!!!!) (Recommended Pair) 27 Philco by Sylvania NOS 1940's (6.4ma and 6.7ma)
$47.99
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1 pair) 27 Philco by Sylvania NOS 1940's 1 tube) 6.4ma Gm=1000 1 tube) 6.7ma Gm=1000 NOS mA 5.2ma+ NOS Gm 900+
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$39.99
$47.99
(+$8)