(!!!) (Best Pair) 6CG7 Tungsol NOS black shield between plates, large "O" getter halo 1960 era (8.5/8.6ma and 8.6/8.7ma) 1-2% section balance
$119.99
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1 low noise pair) 6CG7 Tungsol NOS black shield between plates, large "O" getter halo 1960 era - same build 1 tube) 8.5/8.6ma Gm=2700/2700 smeared printing on glass 1 tube) 8.6/8.7ma Gm=2600/2700 good printing Recommended for Conrad Johnson Audio Research Ampeg Stax Marantz
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