(!!!!!) (Best Pair #2) 5687WA and 5687WB GE black plates like new 1970's (39/38.5ma and 37/41ma) (Highest Ma and Gm)
$79.99
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1 low noise tube) 5687WA and 5687WB GE black plates - same build - test like new 1970's in white boxes 1 tube) 39.0/38.5ma Gm=11,400/12,000 1 tube) 37.0/41.0ma Gm=11,150/11,650 Good Ma range 30-35ma Recommended for Manley Modwright Audio Note Ray Samuels Ayon Kondo Mastersound Audio Thrills Loth
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