(!!!) (slightly microphonic) 5687 Tungsol black plates "U" getter halo branded GE NOS 1950's (36/40ma)
$29.99
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1 low noise tube) 5687 Tungsol black plates "U" getter halo branded GE NOS 1950's in white box 1 section) 36ma Gm=11,000 1 section) 40ma Gm=11,800 Recommended for Manley Modwright Audio Note Ray Samuels Ayon Kondo Mastersound Audio Thrills Loth
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