3 X EF86 ( 6CF8 ) Mullard / VALVO - O getter - 1964/3 Valve Tube Test (K916)

V1: 1900 mhos gm 8Y2 D4I2 1964 V2: 1950 mhos gm 8Y2 D3C2 1963 V3: 1600 mhos gm 8Y2 D3D2 1963

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