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(!!!!) (Recommended Pair) 5687 Tungsol black plates large "U" getter used/test like new 1950's (41/40ma and 37/41ma) (highest Ma and Gm)
(!!!!) (Recommended Pair) 5687 Tungsol black plates large "U" getter used/test like new 1950's (41/40ma and 37/41ma) (highest Ma and Gm)
By Tube World
$ 99.99
1 low noise pair) 5687 Tungsol black plates large "U" getter used/test like new 1950's in white box - no printing on glass
1 tube) 41/40ma Gm=12,000/11,400
1 tube) 37/41ma Gm=11,500/12,000
Good used Ma = 30ma
Good used Gm = 10,000
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth
See more: vacuum tube
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 (Recommended Pair) 5687 Tungsol black plates large "U" getter used/test like new 1950's (41/40ma and 37/41ma) (highest Ma and Gm)&Category=vacuum tube&ImageURL=http://tubeworldexpress.com/cdn/shop/products/5687tsp26.jpg?v=1571438839){kind=link}
 (Recommended Pair) 5687 Tungsol black plates large "U" getter used/test like new 1950's (41/40ma and 37/41ma) (highest Ma and Gm) "Pin It")