(!!!!) (Recommended Used Pair) 6550C Svetlana Russian used/good 1997-2000 (135ma and 136ma) ** (1-3% matched)

1 pair) 6550C Svetlana Russian used/good 1997-2000

1 tube) 135ma Gm=10,600 (1997)

1 tube) 136ma Gm=11,000 (2000) faded top getter

Good NOS mA range 130-150mA

Sweet spot is 140mA

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