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(!!!!) (Best Overall Pair) 50 Sylvania and Sylvania branded Zenith ST-16 shape NOS original box 1940's (60ma and 63ma)

$ 398.88

1 pair) 50 Sylvania ST-16 shape NOS original box 1940's

- same plate shape

- same ceramic supports

- different getter halo shapes:

  SYLVANIA "L" bracket with dimple in middle

  ZENITH: small "D" getter halo

- SYLVANIA standard nickel grid side rods

- ZENITH copper grid side rods 

 

1 tube) 60ma Gm=2400 (SYLVANIA) "L" bracket getter halo

1 tube) 63ma Gm=2500 (SYLVANIA branded ZENITH) small "D" getter halo - shorter bottle

 

MATCHED ON AMPLITREX

Vplate=440V

Vgrid=-66V

Good NOS Ma = 55-60ma

Good NOS Gm = 2100

 

 

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See more: vacuum tube
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