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(!!!!) (Best Sylvania Pair) JHS-5687WA Sylvania black plates NOS 1964 (38.5/39ma and 39/39.6ma) (High Ma and Gm) 1-2% matched

(!!!!) (Best Sylvania Pair) JHS-5687WA Sylvania black plates NOS 1964 (38.5/39ma and 39/39.6ma) (High Ma and Gm) 1-2% matched

$ 119.99

1 low noise pair) JHS-5687WA Sylvania black plates NOS 1964

1 tube) 38.5/39.0ma Gm=12,400/12,300

1 tube) 39.0/39.6ma Gm=12,300/12,400

 

Good Ma range 30-40ma

Good Gm range 10,000-12,000

 

Recommended for

Manley

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Audio Thrills

Loth

 

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