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(!!!) (Recommended Single) 5687 Tungsol black plates "U" getter branded FEDERAL NOS mid-1950's (34ma/45ma)
(!!!) (Recommended Single) 5687 Tungsol black plates "U" getter branded FEDERAL NOS mid-1950's (34ma/45ma)
$ 69.99
1 low noise tube) 5687 Tungsol black plates "U" getter branded FEDERAL NOS mid-1950's
34ma Gm=10,900
45ma Gm=12,000
Good Ma range 30-35ma
Tested on Amplitrex
Recommended for
Manley
Modwright
Audio Note
Ray Samuels
Ayon
Kondo
Mastersound
Audio Thrills
Loth
See more: vacuum tube
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 (Recommended Single) 5687 Tungsol black plates "U" getter branded FEDERAL NOS mid-1950's (34ma/45ma) "Pin It")