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(!!!) (Recommended Pair) 311B Amperex made in Russia NOS 1977 (data listed soon)

(!!!) (Recommended Pair) 311B Amperex made in Russia NOS 1977 (data listed soon)

$ 139.99

1 pair) 311B Amperex made in Russia NOS 1977 large getters - excellent conditon

1 tube) data listed soon

1 tube) 

 

Tested on Amplitrex

Vplate=180V

Vscreen=135V

Vgrid=-15V

Good Ma = 30ma

Good Gm = 2900

 

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