(!!!!) (Best Value Like New Pair) 6550C Svetlana Russian like new 2011 (148ma and 150.4ma)
By Tube World
$ 129.99
1 pair) 6550C Svetlana Russian like new 2011 good top getters P20 in Svetlana boxes
1 tube) 148.0ma Gm=11,050
1 tube) 150.4ma Gm=11,650
Good NOS mA range 130-150mA
Sweet spot is 140mA
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