12BH7A GE gray oval plates used/good “”U”” getter 1950”s (7.6/7.8ma) Title: 12BH7A

1 low noise tube) 12BH7A GE gray oval plates used/good “”U”” getter 1950”s

1 section) 7.6ma Gm=2200

1 section) 7.8ma Gm=2200

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