(!!!) (Best Single 1962) JHS-12AX7 Sylvania NOS 1962 (Gm=2600/2500 and 1.8/1.9ma)

1 low noise tube) JHS-12AX7 Sylvania NOS 1962

1.8ma Gm=2600

1.9ma Gm=2500

Good Gm range 1600-1800+

neutral balanced presence

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