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(!!!!) (Best Pair) 50 RCA Cunningham ST-19 glass shape - engraved bases - low hours/test like new 1930's same date codes (Z4) (61ma and 66ma) (strong Ma and Gm)

$ 488.88

1 matched pair) 50 RCA Cunningham ST-19 glass shape, engraved bases, low hours/test like new 1930's same date codes (Z4) in white boxes, very large getters, 100% identical condition

1 tube) 61.5ma and Gm=2350

1 tube) 66.0ma and Gm=2450

 

Matched on Amplitrex

Vplate=400V

Vgrid=-66V

Good NOS Ma = 55-60ma

Good NOS Gm = 2100

See more: vacuum tube
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